Computer Science 1032A/B Chapter Notes - Chapter 4: Botnet, Horizontal Market, Grid Computing

• School: Western University
• Department: Computer Science
• Course: Computer Science 1032A/B
• Professor: Louis Magguilli

Document Summary

History of it is recent first digital computing devices were invented in 1940. Mainframes obsolete vacuum tube technology smaller, easier to maintain, more reliable. Large, complex, ran only one program reprogrammable general purpose computer. Many users could share the main processor at the same time. -400k, add or subtract 16k numbers per second. Electronic numerical integrator and computer (eniac) first. Computer bug actual moth was caught in the mark ii aiken relay calculator. Mainframes mainstay of business computing since 1960s, continue to be incorporated a cpu and short term memory into a single silicon (cid:498)chip(cid:499) using. Mits altair 8800, data-point 2200 1975. Didn"t have display screen, users developed their own programs sharing data was tedious data stored on a floppy drive then transferred into. Many programs used in larger organizations still run on mainframe systems. Hardware tech developed, companies created programming languages and operating systems. Networking personal computers wanted to use on the computer produced even today.