The first object-oriented language Smalltalk developed at XEROX PARC, based on ideas by Alan Kay. The first logic programming language Prolog developed by Alan Colmerauer at University of Marseilles Hewlett-Packard introduces a programmable calculator with a magnetic stripe memory for storing programs 1973 IBM develops a cheap disk and drive: IBM introduces the IBM 3340 hard disk unit, known as the Winchester, IBM's internal development code name. The recording head rides on a layer of air 18 millionths of an inch thick. It uses four 8-inch diameter platters, giving it a capacity of 70 MB. Scelbi Computer Consulting Company offers the first computer kit in the U.S. using a microprocessor, the Intel 8008-based Scelbi-8H, for US$565, with 1KB programmable memory. An additional 15KB is available for US$2760. 1974 MITS completes the first prototype Altair 8800 microcomputer. Bravo is developed for the Xerox Alto computer. It is the first WYSIWYG program for a personal computer.
Gary Kildall writes a simple operating system in his PL/M language. He calls it CP/M (Control Program/Monitor). Stephen Wozniak joins Hewlett-Packard. Gary Kildall creates PL/M for the Intel 8008, based on PL/I. IBM develops a cheap disk and drive. IBM introduces the IBM 3340 hard disk unit, known as the Winchester, IBM's internal development code name. The recording head rides on a layer of air 18 millionths of an inch thick. It uses four 8-inch diameter platters, giving it a capacity of 70 MB. Gary Kildall begins consulting work at Intel. Scelbi Computer Consulting Company offers the first computer kit in the U.S. using a microprocessor, the Intel 8008-based Scelbi-8H, for US$565, with 1KB programmable memory. An additional 15KB is available for US$2760. Bob Metcalfe invents the Ethernet connectivity system. 1974 Intel releases its 2-MHz 8080 chip, an 8-bit microprocessor
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