Computer Science 1032A/B Chapter Notes - Chapter 4: Local Area Network, Altair 8800, Wide Area Network

• School: Western University
• Department: Computer Science
• Course: Computer Science 1032A/B
• Professor: Shauna Burke

Document Summary

Eniac: 1946, calculate firing tables for ballistic missiles. Mark ii aiken relay calculator: harvard, 1947- terms bug & debugged arose b/c of moth caught in mechanical relays. Digital computer: canada, uoft, 1952: mainframes: First generation: large, room-sized devices based on vacuum technology; cost: ,000- Second generation: late 1950s; transistors- smaller, easier to maintain, reliable. Third generation: mid 1960s; operating systems, multiprocessing capability; : microcomputers: Incorporated central processing system (cpus) & some short term memory into single silicon chip using integrated circuits (ics) Microsoft created languages (basic) & operating systems (dos: networking personal computers: Local area network (lan): set of rules/protocols, allowed connected devices to communicate & share information; each device=specific address. Wide area network (wan): email, web browser, access to worldwide network of computers: mobile & tablet computing: Save resources by coding last 2 digits of year vs 4 digits (i. e. 65 vs 1965)