PC History

PC History

By the early 1970s, only a few that were involved on academic or research institutions had the chance to access to a computer system in interactive mode for extended durations, because these systems at that time were too expensive to be owned by a single person.

The proliferation of personal computers after 1975 was achieved with the introduction of the microprocessor. The microprocessor is nothing more but a chip with all the circuitry that formerly occupied large cabinets. In 1968, SRI researcher Douglas Englebart gave a preview of what would turn out to be the basis of daily working life in the 21st century.

Microcomputers, which were the early personal computers, were sold habitually in Electronic kit form and in limited volumes. The output used to be provided by front panel indicators, and minimal programming used to be done by toggle switches.

Peripherals such as keyboards, computer terminals, disk drives, and printers were needed for practical use. The first non-kit "personal" computer based on a microprocessor, known as Micral N, was built in 1972 and about 90,000 units were sold. The first complete personal computer known as Commodore PET, was introduced in January 1977, soon followed by the Apple II.

Computers developed among 1970s and 1980s were intended for household use, providing the user personal productivity, programming and games. Rather bigger and more expensive systems were intended for office and small business use.