LECTURE 2: COMPUTER REVOLUTION

Computer ScienceAlemany High SchoolSummer 2008Mr. Galla

I. REVOLUTION!

industrial revolution – led to surplus of technology and the computer revolution

Computer revolution – each household having a computer

information revolution – mental work is being automated

II. DATA VS. INFORMATION

DATA VS. INFORMATION (CONT’D) The act of using a computer to assist in the

conversion of the “Process of data” is called information processing

The diagram below shows information processing and the 4 functions that a computer must be able to perform

III. WHAT IS A COMPUTER?

Micro – electronics – refers to the miniaturization of the components of an electronic circuit

“IC” integrated circuit – all of the components of an electric circuit on a single piece of semi-conduction material called silicon.

Computer/microprocessor/microchip/processor – thousands of electrical circuits etched onto a very small piece of silicon

IV. A COMPUTER “SYSTEM”

a computer system is a collection of at least 4 basic components:1. computer – the tower (desktop/box)2. input device – keyboard, mouse , etc.3. output devices – printer, speakers, etc.4. storage – divided into primary &

secondary storage

V. AN INFORMATION “SYSTEM”

1. hardware2. software

3. data4. people

5. procedures

VI. PROCESSING POWER

processing power depends on processor speed and processor memory

VII. CLASSIFYING COMPUTER SYSTEMS

Computer systems can be classified - Supercomputer system - Mainframe system - Mini Computer system - Workstation system - Microprocessor system - Laptop/notebook - Handheld - Smartphone