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The history of the personal computer as a mass-market consumer electronic device began with the microcomputer revolution of the 1970s. A personal computer is one intended for interactive individual use, as opposed to a mainframe computer where the end user's requests are filtered through operating staff, or a time-sharing system in which one large processor is shared by many individuals.
The history of computer science began long before the modern discipline of computer science, usually appearing in forms like mathematics or physics.Developments in previous centuries alluded to the discipline that we now know as computer science. [1]
A human computer, with microscope and calculator, 1952. It was not until the mid-20th century that the word acquired its modern definition; according to the Oxford English Dictionary, the first known use of the word computer was in a different sense, in a 1613 book called The Yong Mans Gleanings by the English writer Richard Brathwait: "I haue [] read the truest computer of Times, and the best ...
Developer: Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna at Bell Labs: Written in: C and assembly language: OS family: Unix: Source model: Historically proprietary software, while some Unix projects (including BSD family and illumos) are open-source and historical Unix source code is archived.
Univac 9400 installation. The UNIVAC 9000 series (9200, 9300, 9400, 9700) is a discontinued line of computers introduced by Sperry Rand in the mid-1960s to compete with the low end of the IBM System/360 series.
The Atanasoff–Berry computer (ABC) was the first automatic electronic digital computer. [1] The device was limited by the technology of the day. The ABC's priority is debated among historians of computer technology, because it was neither programmable, nor Turing-complete. [2]
This article presents a timeline of events in the history of 16-bit x86 DOS-family disk operating systems from 1980 to present. Non-x86 operating systems named "DOS" are not part of the scope of this timeline.
For classical reversible computation, a constant number O(1) of ancilla bits is necessary and sufficient for universal computation. [2] While additional ancilla bits aren't strictly required, they can provide extra working space, leading to simpler circuit constructions using fewer logic gates.