is the understanding of real things or
abstract concepts

A collection of raw facts and figures. It may consist of numbers, characters,
symbols or pictures

Processed data. It is more meaningful than data

Data can only be considered to be
'real’ if it meets certain criteria

Knowledge: is data processed for some
purpose

encompasses all of
the technology that we use to collect, process,
protect and store information

.... : This concept involves transfer and use of
all kinds of information

ICT is the foundation of economy and a driving
force of social changes in the 21st century.
Distance is no longer an issue when it comes to accessing information

Information is collected & given to computer for processing

Computer process information to the required data

Information is given to the user as input

information is stored in the computer for further use

Programs are stored in the Computer processor

there are various views of computer systems
 User’s view
 Programmer’s view  Architect’s view  Implementer’s view

there are several types of computers like
• Embedded computers
• Personal computers • Servers and Enterprise systems • Supercomputers and Grid computers • “Cloud” computing

... View of Computer System sees it as
Application software
System software System Hardware

used for running larger programs for multiple
users or programs that require continuous online access.
They are typically accessed only via a network

A class of computers with the highest
performance and cost. They are configured as servers and
typically cost millions of dollars

designed for use by an
individual, usually incorporating a graphics display,
keyboard, and mouse

are inside another device used for
running one predetermined application or collection of
software. Examples: cell phones, video games, digital TVs, PDAs, etc.