Computer Science 1032A/B Chapter 4: Chapter Four.docx

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

Document Summary

Q2: where did all this it stuff come from. Early computers: 1939-1952: early computers were financed by the us military, eniac (electronic numerical integrator and computer) is the first computer, designed in. Mainframes: 1952-present: first commercial digital computers, which were large, room-sized devices based on now- obsolete vacuum tube technologies were called mainframes, second generation mainframes were called transistors, no software, third generation mainframes included osw and multiprocessing capabilities. Microcomputers: 1975-present: microprocessor developed by texas instruments and intel in the early 70s, first microcomputers were called mits altair 8800 and data-point 2200. Mobile and tablet computing: late 1990s-present: the dramatic lowering of costs for cellular technology and mobile telephones meant that these technologies became commonplace and adoped by large groups of people. Binary digits: computers represent data using binary digits, called bits, a bit is either a 0 or a 1, an open switch represents a 0, an closed switch represents a 1.