History of Computers 1.6 thru 1.13

5cm long section18 section18 mainframes mainframe

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Unformatted text preview: lace hundreds of transistors Millions of calculations per second Made computers smaller in size and less expensive Integrated Circuit (IC) cont’d A typical chip is about 1 cm wide by 2.5 cm long Section 1.8 Section 1.8 Mainframes Mainframe Mainframe Large computer system usually used for multi­ user applications – Ex: Delta IBM 360 Communicate using terminals—keyboard for data input and a monitor for viewing output – Connected by wired to the computer Section 1.9 Section 1.9 Fourth Generation Computers Microprocessor Microprocessor 1970 Marcian Hoff An entire CPU on a single chip Led to Microcomputers – fits on the desk top Altair Altair 1975 First Microcomputer First Apple Computer First Apple Computer 1976 Stephen Wozniak and Steven Jobs Section 1.10 Section 1.10 The Personal Computer Personal Computer (PCs) monitor printer mouse CPU CD-ROM drive disk drive keyboard 4 Types of Hardware 4 Types of Hardware Input Devices—from which the computer can accept data – Keyboard, CD­ROM drive, disk drive, mouse Memory—ICs inside the base unit that store data electronically CPU—an IC inside the base unit that processes data and controls the flow of data between the computer’s other units. It’s where the computer makes decisions Output Devices—display or store data ...
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