Free IT Education

Touch Screen

2012-08-03T05:37:00.000-07:00

Touch Screen:-

Touch screen is a type of display screen that has a touch sensitive transparent panel covering the screen. Instead of using a pointing device such as a mouse or a device pen, you can use your finger to point directly to objects on the screen. Although touch screens provide a natural interface for computer novices, they are unsatisfactory for most application because the finger is such as large relatively large object. It is impossible to point accurately to small areas of the screen. In addition, most users find touch screens tiring to the arms after long use.

How its work:-

The basic touch screen has three basic systems.

Resistive System
Capacitive System
Surface Acoustic Wave (SAW)

Resistive System:-

The resistive system consists of a normal glass panel or a touch screen sensor is a clear glass panel with a touch responsive surface,that is covered with a conductive and a resistive metallic layer.The sensor generally has an electrical current or signal going through it and touching the screen causes a voltage or signal change. This voltage change is used to determine the location of the touch to the screen.

Capacitive System:-

In the capacitive system, a layer that stores electrical charge is placed on the glass panel of the monitor. When a user touches the screen with his finger, some of the charge is transferred to the user, so the charge on the capacitive layer decreases and this decrease is measured in circuits located at each corner of the screen. The computer calculates, from the relative differences in charge at each corner, exactly where the touch event took place and then relays that information to the touch-screen driver software.

Surface Acoustic Wave (SAW):-

Surface acoustic wave (SAW) technology uses ultrasonic waves that pass over the touchscreen panel. This technology came in the late 90′s, and uses sound waves to calculate where you have pressed. When the panel is touched, a portion of the wave is absorbed. This change in the ultrasonic waves registers the position of the touch event and sends this information to the controller for processing. Surface wave touch screen panels can be damaged by outside elements.The screen is covered by a special glass,called as Small transducers, marked as transmitters in the green on the image, it sends out sound waves. Using the small “mirror” which are then reflected those beyond the screen surface. When you press on the screen, the recipients by means of reflections and delays calculate where you have pressed.

The sound waves are sent out from the transmitters, and for every mirror they pass is a small part reflected over the surface, while the rest continue on to the other mirrors. Since sound beam lose strength, are the mirrors at the end of the range set closer together. In the same way the waves are reflected back to the receiver on the opposite side of the glass.

Jaz Disk

2012-08-02T18:29:00.000-07:00

Jaz Disk:-

Jaz disks are removable disk drives developed by the Iomega Corporation. The jaz drive has a 12mm average seek time and a transfer rate of 5.5Mbps. The removable cartridges hold 1GB of data. The fast data rate and large storage capacity make it a viable alternative for backup storage as well as everyday use.

Zip Disk

2012-08-02T16:14:00.000-07:00

Zip Disk:-

Zip disks are high capacity floppy disk drives developed by the Iomega Corporation. Zip disk are slightly larger than the conventional floppy disks, and are about twice as thick. They can hold 100 MB of data. Because relatively inexpensive and durable, they have become a popular medical for backing up hard disks and for transporting large files.

Data & its Types

2012-07-05T01:14:00.000-07:00

Data:-

Data is a collection of facts and figure. data can be any text, number image etc.

Types of Data:-

Data have following types:-

Numerical Data (or quantitative data)
Alphabetic data
Alphanumeric Data

Numerical data (or quantitative data):-

Data measured or identified on a numerical scale. Numerical data can be analyzed using statistical methods, and results can be displayed using tables, histograms and graphs.
For Example:-
A researchers will ask a questions to a participant that include words how often, how many or percentage. The answers from the questions will be numerical. Having decimal values 45 -94 etc.

Alphabetic data:-

The type of data which consists of alphabets is called Alphabetic Data. It may contains alphabetic letters both upper and lower case.

Alphanumeric data:-

Alphanumeric (sometimes shortened to alphanumeric Data) is a combination of alphabetic and numeric characters, and is used to describe the collection of Latin letters and Arabic digits or a text constructed from this collection. There are either 36 (single case) or 62 (case sensitive) alphanumeric characters. The alphanumeric character set consists of the number 0 to 9 and letters A to Z. In the Perl programming language, the underscore character ( _ ) is also considered to be a member of the alphanumeric set of characters.

Data Processing:-

Refers to a class of programs that organize and manipulate data, usually large amount of numeric data. Accounting programs are the prototypical examples of data processing applications. In contrast, word processors, which manipulate text rather than numbers, are not usually referred to as data processing applications.

Electronic data processing:-

Electronic data processing is any process that a computer program does to enter data and summaries, analyze and otherwise convert data into usable information. The process may be automated and run on a computer data processing systems typically manipulate raw data into information, and likewise information systems typically take raw data as input to produce information as output.

Types of Software

2012-05-17T14:41:00.004-07:00

Software :-

Some major types of Software are

1). Programming Software:-

This is one of the most commonly known and popularly used forms of computer software. These software come in forms of tools that assist a programmer in writing computer programs. Computer programs are set of logical instructions that make a computer system perform certain tasks. The tools that help the programmers in instructing a computer system include text editors, compilers and interpreters.

2). System Software:-

It help in running the computer hardware and the computer system. System software is a set of Operating System

device drivers, servers. windowing system and utilities. System software helps an application programmer in abstracting away from hardware, memory and other internal complexities of a computer.

3). Application Software:-

It enables the end users to accomplish certain specific tasks. Business software, databases and educational software are some forms of application software.

Different word processors, which are dedicated for specialized tasks to be performed by the user, are other examples of application software.

A part from these three types of Software, there are some other well known forms of computer software like inventory management software, ERP ,utility software, accounting software and others.

Inventory Management System:-

This type of Software helps an organization in tracking and goods and materials on the basis of quality as we as quantity. Warehouse inventory management functions encompass the internal warehouse movements and storage. Inventory software helps a company in organizing inventory and optimizing the flow of goods in the organization, thus leading to an improved customer service.

Utility Software:-

Utility software also known as service routine, utility software helps in the management of computer hardware and application software. It performs a small range of tasks. Disk defragmenters, system utilities and virus scanners are some of the typical examples of utility software.

Data Backup and Recovery Software:-

An ideal data backup and recovery software provides functionality beyond simple copying of data files. This software often supports user needs of specifying what is to be backed up and when Backup and recovery software preserve the original organization of files and allow an easy retrieval of the backed up data.

Software

2012-05-16T17:15:00.001-07:00

Software is means by which computer systems speak with computer users. Software forms the heart of computer systems.
Software, by definition, is a collection of computer programs, procedures and documentations that performs different tasks on a computer system. The term 'Software' was first used by John Tukey in 1958. At the very basic level, computer software consists of a machine language that consist of group of binary values, which specify processor instructions. The processor instructions change the state of computer hardware in a predefined sequence. Briefly, computer software is the language in which a computer speaks. Some major types of computer software are:-

Types of computer software:-

There are different types of Computer software :-

1). Programming Software :-

2). System Software :-

3). Application Software :-

Optical Disk

2012-02-12T06:50:00.004-08:00

Optical Disk :-

Laser is used to read and write data on Optical Disk. To save data on disk laser beam creates small holes on disk. Optical drive laser beam able to read the holes on disk. The presence of holes indicates 1 and absent indicates 0.

Optical technology work fast then a magnetic method.

Types of Optical Disk :-

1). CD :-

A CD ROM an acronym of " Compact Disc Read Only Memory " is a pre-pressed compact disc that contains data accessible to, but not writable.

CD ROM are popularly used to distribute computer software, including video games and multimedia applications, through any data can be stored (up to the capacity limit of a disk.

2). DVD :-

DVD ROM stands for " Digital Versatile Disc Read only Memory " and refers to a drive that can read dvd discs. The advent of DVD ROM drives has made it easier for computers users to access large amounts of data as well as providing a medium for watching videos. DVDs can hold many times of the storage of a CD.

So, Computer applications that required four or five CDs should be consolidated into a single disc. Video and commercial movies could be played on the computer as well.

Hard Disk

2012-02-12T05:43:00.002-08:00

Hard Disk :-

Hard disk drive is a type of magnetic disk. It consisit round plates called platter. Data store on platter A head fix on plates to read and write data. Platters usually constructed of aluminum or glass which cannot be bent like floppy disc hence termed as hard disk. A hard disk drive normally has one head per platter with all heads mounted on common rack. The had disk spins the disk as 3600, 5400, and upto 7200 or even more RPM (rotation per minute). We save a lot of data on hard disk. Hard disk is used in computers to save the important data.

Basic Hard Drive Components:

Disk Platters

Read/Write head

Spindle motor

Head actuator mechanism

Logic Board

Cable and Connectors

Configuration items

Sector in Hard Disk :-

Sector is a section of a tracks which stores a predetermined number of Bytes

Floppy Drive

2012-02-11T12:40:00.001-08:00

Floppy Disk :-

Floppy disk is a data storage medium that is composed of a disk of thin, flexible (''floppy'') magnetic storage medium sealed in a square or rectangular plastic carrier lined with fabric that removes dust particles. Floppy disks are read and written by a floppy disk drive.

In average floppy disk memory is '' 1.44 MB ''

Magnetic Disk

2012-02-11T11:01:00.001-08:00

Dear Member,

This is our first post related to Storage Devices Session...

In this post we tell you about the knowledge of Magnetic Disk and its importance...

SO FRIENDS LETS START OUR LESSON

Magnetic Disk :-

A memory device, such as floppy disk, or a removable cartridge, that is covered with a magnetic coating on which digital information is stored in the form of microscopically small, magnetic needles. The disk surface is divided into concentric tracks (circles within circles). The thinner the tracks, the more storage. The data bits are recorded as tiny magnetic spots on the tracks.

The smaller the spot, the more bits per inch and greater the storage. Tracks are further divided into sectors, which hold a block of data that is read or written at one time; for example, READ SECTOR 782, WRITE SECTOR 5448.

In order to update the disk, one or more sectors are read into the computer, changed and written back to disk. The operating system figures out how to fit data into these fixed spaces.

Storage Devices

2012-02-09T23:23:00.000-08:00

Dear Members,

''Output Devices session is now completed on IT School''

So, now the Session of Storage Devices will be start soon.

Storage Devices :-

A storage device is s hardware capable of storing information. There are two storage devices used in computer a primary storage device such as computer RAM and a secondary storage device such as a computer hard disk drive.

So keep visiting IT School and be educated at not cost.If you like our blog don't forget to give a feedback.

Thanks for your time.

Printer

2012-02-09T15:59:00.001-08:00

Dear Member,

''This is our last post related to Output Devices Session''

In this post we give you brief knowledge about Printer its types & its uses...

SO FRIENDS LETS START LESSON

Printer :-

A device that prints text or illustrations on paper. A computer printer is a computer peripheral device that produces a hard copy (permanent human readable text or graphics, usually on paper) from data stored in a computer connected to it. A printer is used to print anything that you want, like pictures or documents or data. Printers are awesome devices that plugin where there is a USB slot, from there you can click print and the document is sent to the port where your document is printed onto the piece of paper. You can print images, documents, cards etc.

Types of Printer :-

1). Impact printers

2).Non impact printers

Impact Printers :-

Impact printer produces text and images when tiny wire pins on print head strike the ink ribbon is physically contacting the paper.

Daisy Wheel Printer :-

A type of printer that produces letter quality type. A daisy wheel printer works on the same principle as a ball head typewriter. The daisy wheel is a disk made of plastic or metal on which characters stand out in relief along the outer edge. To print a character, the printer rotates the disk until the desired letter is facing the paper. Then a hammer strikers the disk, forcing the character to hit an ink ribbon, leaving an impression of the character on the paper. You can change the daisy wheel to print different fonts.

Dot Matrix Printer :-

A type of printer that produces characters and illustrations by striking pins against an ink ribbon to print closely spaced sots in the appropriate shape. Dot matrix printers are relatively expensive and do not produce high quality output.

Non impact Printers :-

Non impact printers are much quieter than impact printers as their printing heads do not strike the paper.

Most non impact printers produce dot matrix patterns. Several different technologies have been used to provide a variety of printers.

The main types of non impact printers are :-

Thermal Printer
Laser Printer
Ink Jet Printer

1). Thermal Printers :-

A thermal printer uses heat to form an image onto a special kind of paper. This paper have a coating that changes to black color when exposed to heat over a period of time.

2). Laser Printers :-

A type of printer that utilizes a laser beam to produce a image on a drum. The light of the laser alters the electrical charge on the drum whenever it hits. The drum is then rolled through a reservoir of toner, which is picked up by the charged portion of the drum. Finally, the toner is transferred to the paper through a combination of heat and pressure. This is also the way copy machines work.

3). Ink Jet Printers :-

Inkjet printers are the most common type o consumer printers. The inkjet technology works by spraying very fine drops of ink on a sheet of paper. These droplets are ''ionized'' which allows them to the directed by magnetic plates in the ink's path. As the paper is fed through the printer, the print head moves back and forth, spraying thousands of these small droplets on the page.

Liquid Crystal Display (LCD)

2012-02-09T14:57:00.001-08:00

Dear Members,

In this lesson we will tell you about Liquid Crystal Display (LCD) also tell you how its work....

SO FRIENDS LETS START LESSON

Liquid Crystal Display (LCD) :-

LCD is a short of Liquid Crystal Display, a type of display used in digital watches and many portable computers.

LCD displays utilize two sheets of polarizing material with a liquid crystal solution between them. An electric Current passed through the liquid causes the crystal to align so that light cannot pass through them.

Each crystal, therefore, is like a shutter, either allowing light to pass through or blocking the light.

Monitor

2012-02-09T13:10:00.001-08:00

Dear Members,

This is our first lesson related to Output Devices Session...

In this lesson we give you knowledge about the Monitor and its types.

SO FRIENDS LETS START OUR LESSON

Monitor :-

Monitor is an output device which used to display your data coming from the computer. It is just like a TV. The most important aspect of a monitor is its screen size. Like television, screen sizes are measured in diagonal inches, the distance from one corner to the opposite corner diagonally.

It can be any size like 14 inch 17 inch 21 inch etc. The resolution of a monitor indicates how densely packed the pixels are. In general, the more pixels (often expressed in dots per inch), the sharper the image. Most modern monitors can display 1024 by 768 pixels, the SVGA Standard. Some high end models can by 1200. With respect to color.

Types of Monitor :-

There are many types of Monitor some are mentioned below :-

Monochrome:-

Monochrome monitors actually display two colors, one for the background and one for the foreground. The colors can be black and white, green and black, or amber and black.

Gray-scale :-

A gray-scale monitor is a special type of monochrome monitor capable of displaying different shades of gray.

Color Monitor :-

Color monitors can display anywhere from 16 to over 1 million different colors. Color monitors are sometimes called RGB monitors because they accept three seprate signals - -red, green, blue.

CRT Monitors :-

Abbreviation of cathode ray tube, the technology used in most televisions and computer display screen. A CRT works by moving an electron beam back and forth across the back of the screen. Each time the beam makes a pass across the screen, it lights up phosphor dots on the inside of the glass tube, thereby illuminating the active portions of the screen.

By drawing many such lines from top to the bottom of the screen, it creates an entire screen full of images.

Output Devices

2012-02-08T12:46:00.000-08:00

Dear Members,

Input Devices Lessons are completely shared on IT School...

Now the Session of Output Devices will be start soon. Here i want to tell you that we will discuss some important devices step by step in our upcoming lessons. So, Its easy for you to learn

So keep visiting IT School and learn free IT Education at no cost. If you like our blog don't forget to give a feedback.

Thanks for your time.

Touch pad

2012-02-08T05:31:00.001-08:00

Dear Members,

In this lesson you will learn about Touch Pad and its uses...

SO FRIENDS LETS START OUR LESSON

Touch Pad:-

A touch pad (or track pad) is a pointing device featuring a tactile sensor, a specialized surface that can translate the motion and position of a user’s figure to a relative position on screen.

They are a common feature of laptop computers and also used as a substitute for a computer mouse where desk space is scare. Touch pad’s vary in size.

Joystick

2012-02-08T01:22:00.001-08:00

Dear Members,

In this lesson we will give you knowledge about the Joystick and its uses....

SO FRIENDS LETS START OUR LESSON

Joystick:-

A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. Joysticks are often used to control video games, and usually have one or more push buttons whose state can also be read by the computer.

Joysticks are also used for controlling machines such as cranes, trucks, under water unmanned vehicles, wheelchairs, surveillance cameras.

Track Ball

2012-02-07T10:12:00.001-08:00

Dear Members,

In this lesson we will increase your knowledge about the track ball and its uses....

SO FRIENDS LETS START OUR LESSON

Track Ball:-

Trackball is a pointing device consisting of a ball held by a socket containing sensors to detect a rotation of a ball about two axes- like an upside down mouse with an exposed protruding ball.

The user rolls the ball with the thumb, fingers or a palm of the hand to move a cursor.

Scanner

2012-02-07T07:06:00.001-08:00

Dear Members,

This lessons will increase your knowledge and you will know about the Scanner and its uses..

SO FRIENDS LETS START OUR LESSON

Scanner:-

It’s a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image. Common examples found in offices are variations of the desktop (or flatbed) scanner where the document is placed on a glass window for scanning hand held scanners,

where the device is moved by hand, have evolved from text scanning “wands” to 3d scanners used for industrial design, reverse engineering, test and measurement, orthodontics, gaming and other applications.

Mouse

2012-02-07T06:51:00.002-08:00

Dear Members,

Today we are going to share with you new lesson......

In this lesson we will give you knowledge about Mouse and its types & uses.

SO FRIENDS LETS START OUR LESSON

Mouse:-

A device that controls the movement of the cursor or pointer on the screen. A mouse is a small object you can roll along a hard, flat surface. Its name is derived from its shape, which looks a bit like a mouse, its connecting wire that one can imagine to be the mouse’s tail, and the pointer on the display screen moves in the same direction.

Mice contain at least one buttons as many as three, which have different functions depending on what program is running. Some newer mice also include a scroll wheel for scrolling through long documents.

· Types of Mouse:-

Mechanical:-

Has a rubber or metal ball on its underside that can roll in all directions, Mechanical sensors within the mouse detect the direction the ball is rolling and move the screen pointer accordingly.

Opto Mechanical:-

These mouse same as a mechanical mouse, but uses optical sensors to detect motion of the ball.

Optical:-

Uses a laser to detect the mouse movement. You must move the mouse along a special mat with a grid so that the optical mechanism has a frame of references. Optical mice have no mechanical moving parts. The respond more quickly and precisely than mechanical mice, but they are also more expensive.

Keyboard

2012-02-07T04:09:00.002-08:00

Dear Members,
Today we are going to share with you first lesson related to Input devices. In this post we will give you knowledge about Keyboard and its uses...

SO FRIENDS LETS START OUR LESSON

Keyboard:-

The set of typewriter like keys that enables you to enter data into a computer. Computer keyboards are similar to electric typewriter keyboards but contain additional keys. The keys on computer keyboards as follows:-

1. Alphanumeric keys

2. Modifiers keys

3. Navigation and typing keys

The standard layout of letters, numbers and punctuation is known as a QWERTY keyboard because the first six keys on the top row of letters spell QWERTY. The QWERTY keyboard was designed in the 1800s for mechanical typewriters and was actually designed to slow typists down to avoid jamming the keys. Another keyboard design, which has letters positioned for speed typing, is the Dvorak keyboard.

Alphanumeric Keys:-

Alphanumeric, numeric and punctuation keys are used in the same fashion as a typewriter keyboard to enter their respective symbol into a word processing program. The Space bar is a horizontal row is the lower most rows, which is significantly wider than other keys. Its main purpose to enter the space between words during typing. It is large enough so that a thumb from either hand can use it easily.

Modifiers:-

Modifiers keys are special keys that modify the normal action of another key, when the two are pressed in combination.

For Example:-

<Alt> + <F4> in the Microsoft windows will close the program in an active window. The most widely-used modifiers keys include the Control key, Shift key and the Alt key.

Navigation and Typing Modes:-

Navigation keys include a variety of keys which move the cursor to different positions on the screen. Arrow keys are programmed to move the cursor in a specified direction. ‘Page Up’ and ‘Page down’ keys, scroll the page up and down. The Home key is used to return the cursor to the beginning of the line where the cursor is located; The End key puts the cursor at the end of the line. The tab key advances the cursor to the next tab stop.

Input Devices

2012-01-01T03:25:00.001-08:00

Dear Members,

Many of input devices used in computer and we will discuss some important and common devices step by step in our upcoming lessons. So, Its easy for you to read and to learn

INPUT DEVICES

1. Mouse

2. Keyboard

3.Scanner

4. Track ball

and more....

So keep visiting our blog and learn free IT Education and if you like our Blog don’t forget to make a comment on it.

Thanks for your time.

Computer Memory

2011-12-21T11:55:00.028-08:00

Computer Memory:-

Computer memory refers to the physical devices used to store data or programs (sequences of instructions) on a temporary or permanent basis for use in an electronic digital computer also internal storage areas in the computer. Computers represent information in binary code, written as sequences of 0 and 1. Each binary digit (or ''bit'') may be stored by any physical system that can be in either of two stable states, to represent 0 and 1. Such a system is called bistable. The term memory identifies data storage that comes in the form of chips. 8bit=1byte

Types of Memory:-

RAM (Random Access Memory)
ROM (Read only Memory)

RAM (Random Access Memory):-

Random access memory is used to store data temporarily. This is the same as main memory. When used by itself, the term RAM refers to read and write memory; that is, you can both write data into RAM and read data from RAM. This is contrast to ROM, which permits you only to read data. Most Ram is volatile, which means that is requires a steady flow of electricity to maintain its contents. As soon as that power is turned off, whatever the data was in RAM is lost. It read write data randomly so it is called random access memory.

Types of RAM:-

SRAM (Static Random Access Memory)

DRAM (Dynamic Random Assess Memory)

SRAM (Static Random Access Memory):-

Short for static random access memory and pronounces ess-ram. SRAM is a type of memory that is faster and more reliable then the more common DRAM (dynamic RAM). The term static is derived from the fact that it doesn't need to be refreshed like dynamic RAM.

DRAM (Dynamic Random Access Memory):-

Pronounced Dee-ram, DRAM stands for dynamic random access memory, a type of memory used in most computers. Unlike to sram it need to be refreshed other wise data is lost after some time.

ROM (Read only Memory):-

ROM is a computer memory on which data has been prerecorded. Once data has been written onto the ROM chip, it cannot be removed and can only be read.Unlike main memory (RAM), ROM retains its contents even when the computer is turned off. ROM is referred to as being nonvolatile, whereas RAM is volatile.

Types of ROM:-

PROM (Programmable Read Only Memory)
EPROM (Erasable Programmable Read Only Memory)
EEPROM (Electrically Erasable Programmable Read Only Memory)

PROM (Programmable Read Only Memory):-

Short for programmable read only memory, a memory chip on which data can be written only once. Once a program has been written onto a PROM, it remains there forever. Unlike RAM, PROMs retain their contents when the computer is turned off.

EPROM (Erasable Programmable Read only Memory):-

Acronym for erasable programmable read only memory, and pronounced ee-prom, EPROM is a special type of memory that retain its contents until it is exposed to ultraviolet light. The ultraviolet light clears its contents, making it possible tp reprogram the memory. To write to and erase an EPROM, you need a special device called a PROM programmer or PROM burner.

EEPROM (Electrically Erased Programmable Read Only Memory):-

Pronounced double -ee-prom or e-eprom, short for electrically erasable programmable read only memory. EEPROM is a special type of PROM that can be erased by exposing it to an electrical charge. Like other type of PROM. EEPROM retains its contents even when the power is turned off. Also like other type of ROM, EEPROM is not as fast as RAM.

Central Processing Unit (CPU)

2011-12-20T07:44:00.007-08:00

Central Processing Unit:-

CPU is the abbreviation for Central Processing Unit. The CPU is the brain of computer. Sometimes referred to simply as the central processor, but more commonly called processor,the CPU is where most calculations take place.

In terms of computing power, the CPU is the most important element of a computer system. The CPU itself is an internal component of the computer. Modern CPUs are small and square contain multiple metallic connectors or pins on the underside. The CPU is inserted directly into a CPU socket, pin side down, on the motherboard.

Parts of CPU:-

ALU (Arithmetic Logic Unit)

CU (Control Unit)

ALU (Arithmetic Unit) :-

ALU is the Abbreviation of arithmetic logic unit, the part of a computer that perform all arithmetic computations, such as addition and multiplication, and all the comparison operations. The ALU is the one component of the CPU (central processing unit). The ALU is a fundamental building block of the central processing unit (CPU) of a computer, and even the simplest microprocessors contain one for purposes such as maintaining timers.

CU (Control Unit) :-

CU is the abbreviation of control unit, the part of computer which overall control all the mechanism of processor. It decodes the instruction coming from the device and send to the ALU for necessary action. It also keep track on all the activates of the computer parts.

Types of CPU:-
Complex instruction set computer (CISC):-

A complex instruction set computer (CISC) is a computer where single instruction can execute several low level operations (such as a load from memory, an arithmetic operation, and a memory store) and/or are capable for multi-step operations or addressing modes within single instructions.

Reduced instruction set computing (RISC):-

RISC is a CPU design strategy based on the insight that simplified (as opposed to complex) instructions can provide higher performance if this simplicity enables much faster execution of each instruction.

Uses of Computer

2011-12-18T16:50:00.000-08:00

Uses of Computer:-

Computer are used everywhere. They found their applications starting with playing games till processing satellite image to give weather information.

In Education:-

Now a days computer play an important role in education. Teachers use computer as teaching aids. Now a days colleges are setting up such a system where student and faculty attendance, syllabubs, scheduled of tests are put on the web, students, parents and faculties can access it from anywhere and get update.

Students also use computer to complete their homework given at school or collage.

In Industries:-

Computers play very important role in industries. All modern industries use computer for different tasks. In most advance industries all the task is control by computer. Computer used to automate the manual tasks. Computers control the production quality in industries. Although computer is much faster then a human being so it is used to control of a machines. Computers can be used to produce pattern in textile industries. and color combination of paint industries. In short all advance industries use computer for better production results.

In Business:-

In business computer are used for electrical and administrative purpose.

For Example:-

Tax counting, salary slips preparations etc, can be done by using computers. Stock market predictions can be done. Banks are using computer to maintain the account details and transactions. E-banking is picking up popularity because of flexibility. E-shopping is one more concept gain popularity in industry, when customer can buy the displayed items by paying using credit card on delivery options.

By Government:-

A government use computer at their offices to keep track of attendance of an employee.

For Example:-

Military applications satellite launching and collecting taxes etc.

So we can say computer also play a important role by Government.

At Home:-

In home computers are mostly used for entertainment. They are used to checks mails or chat with family members or friends abroad. You can do video chatting where you can actually see the person you are talking to. Other applications gaming, listening music, watching movies and do some documentation tasks.

In Entertainment:-

A Computer is also used for entertainment. Computer used in movie making and music. We can also watch movies and kind of entertaining videos and music with the help of computers. Kids enjoy playing games using computers.