information Technology

2012-05-11T07:29:00.002-07:00

Information System & Technology

what is data?

Data is a set of facts which describes A particular thing in the Real World. It may represent a Single value or multiple value.

Example: one student marks of a subject

: collection of marks of a one subject more than one student.

What is information ?

Information is collection organized facts. Simple information is process data that is meaningful or used-full to someone.

Process of data information.

These activities involve some mathematical operation and or tabulation operation.

These process requires specific knowledge with describes rules guidelines and procedures

knowledge of process

Rules.

Guidelines

produces

Type Of Data and information

four main types.

Alpa Numberical Data.

(numbers,Letters & other characters)

Image data

(Graphics Image and pictures)

Audio data

(Sound noise & tones)

Video Data

(Movie, image or pictures)

The characteristics of Value Information

The value of information depends on their usefulness in the decision making process this Value Can be judger based on set of features that can be identified in the information they are as followed

Accurate.

Complete

Economical

Flexible

Rellable

Relevant

Simple

Timeliness

Verifiable

Accessible

Secure

Value of Information

the Value of information is calculated with respect to its. usage in decision marketing and return on benefits to the decision taken.

System & Modeling concepts

what is a system ?

A system is a collection of components which work together to achieve a specific goal these components are connected to maintain communication when they work together however they have independent functionalities. There for each component is another system named as a sub system which carries out takes to achieve some object or original system.

Example:

Education system

human body

School.

System components and concepts

in abstract terms a system consists of three main components and few communication links they are input process and output feedback is one communication link.

System boundary

decline the scope of the system with respect to the environment.

Distinguishes the system from everything else in the environment.

System types

Simple or complex.

Open or closed

stable or Dynamic

Adaptive or non Adaptive.

Permanent or temporary.

www

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WORLD WIDE WEB

WORLD wide web (WWW) is a service provided by the internet that allows user to view information in remote computer the computer the computer that allow other computer to view the information that it holds is called a web server. there are a large number web server in today ' s internet and those are collectively known as the World Wide Web. for most users the web is the internet most users connect

introduction the WWW

there is an interesting history behind the world wide web this section takes a look at the development of the world wide web and also some of the important concepts behind this powerful phenomenon

HISTORY OF THE WORLD WIDE WEB

The WWW based on a simple,yet powerful idea by a graduate student of the Harvard university

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apple computer history