LECTURE 2 COMPUTER REVOLUTION Computer Science Alemany High

LECTURE 2: COMPUTER REVOLUTION Computer Science Alemany High School Summer 2008 Mr. 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 Selection Manipulation Organization Knowledge 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 storage input 4 Aspects of Information Processing processing output

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 semiconduction 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” hardware 2. software 3. data 4. people 5. procedures 1.

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