IST 301 Chapter Notes - Chapter 3: E-Commerce, Auxiliary Memory, Mainframe Computer
30 Oct 2014
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Document Summary
Who invented the first mechanical adding machine: 1642: first mechanical adding machine. What kind of equipment did they use: 1946 - first generation computer. The third generation of computing: late 1950s - second generation. 200,000 to 250,000 calculations per second: mid-1960s - third generation. Integrated circuitry and miniaturization: 1971 - fourth generation. Multiprogramming and virtual storage: 1980s - fifth generation. Microcomputers: 1975: altair flicking switches, 1977:commodore and radio shack produce personal computers, 1979: apple computer, the fastest selling pc thus far, 1982: ibm introduced the pc, which changed the market. Midrange systems: high-end network servers that handle large-scale processing of business applications, not as powerful as mainframes. Less expensive to buy, operate, and maintain: often used to manage. Large internet websites, corporate intranets and extranets. Integrated, enterprise-wide applications: used as front-end servers to assist mainframes with telecoms and networks. Mainframe computer systems: large, fast, powerful computer systems. Handles complex computations: widely used as superservers for .
