Computer Science 1033A/B Chapter Notes - Chapter 4: Bell Labs, Microsoft Powerpoint, Quickbooks

• School: Western University
• Department: Computer Science
• Course: Computer Science 1033A/B
• Professor: Prof

Document Summary

Resulting of expensive computer memory in the early days of computing. Knowing something about where technology has been, can help us understand where technology is headed. First generation, were based on now obsolete vacuum tubes technology. Second generation mainframes introduced in the late 1950s used transistors . These first and second generation machines were often sold without software: Ibm 650 (,000 -- ,000) the assumption was that companies themselves would develop the programs they wanted to use on the computer. The third generation of mainframe machines introduced in the mid-1960s including operating systems and multiprocessing. Timesharing many users could share the main processor at the same time. Models such as the ibm z96 still being used today. The first microcomputers, like the mits altair 8800 and datapoint 2200, were developed in 1975. These early microcomputers often had no display careen or monitor and required users to develop their own programs.