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It was a preliminary version of the full ACE, which had been designed by Alan Turing. Aug 1950: US SWAC (Standards Western Automatic Computer) demonstrated at UCLA in Los Angeles; fastest computer in the world until IAS machine. Sep 1950: GER Konrad Zuse leased his Z4 machine to the ETH Zurich for five years. Z4 was a relay-based machine.
The Computer History in time and space, Graphing Project, an attempt to build a graphical image of computer history, in particular operating systems. The Computer Revolution/Timeline at Wikibooks "File:Timeline.pdf - Engineering and Technology History Wiki" (PDF). ethw.org. 2012. Archived (PDF) from the original on 2017-10-31
Historical lowest retail price of computer memory and storage Electromechanical memory used in the IBM 602, an early punch multiplying calculator Detail of the back of a section of ENIAC, showing vacuum tubes Williams tube used as memory in the IAS computer c. 1951 8 GB microSDHC card on top of 8 bytes of magnetic-core memory (1 core is 1 bit.)
An ERA drum was the internal memory for the ATLAS-I computer delivered to the U.S. Navy in October 1950 and later sold commercially as the ERA 1101 and UNIVAC 1101. Through mergers , ERA became a division of UNIVAC shipping the Series 1100 drum as a part of the UNIVAC File Computer in 1956; each drum stored 180,000 6-bit characters (135 kilobytes).
Stephen White's Computer history site (the above article is a modified version of his work, used with permission) Digital Deli, edited by Steve Ditlea, full text of the classic computer book; Collection of old analog and digital computers at Old Computer Museum; ZX81 Computer Online Museum; Yahoo Computers and History
Content-addressable memory (CAM) [186] has become inexpensive enough to be used in networking, and is frequently used for on-chip cache memory in modern microprocessors, although no computer system has yet implemented hardware CAMs for use in programming languages. Currently, CAMs (or associative arrays) in software are programming-language ...
This had 60 50-bit words of memory in the form of capacitors (with refresh circuits—the first regenerative memory) mounted on two revolving drums. The clock speed was 60 Hz, and an addition took 1 second. For secondary memory it used punched cards, moved around by the user. The holes were not actually punched in the cards, but burned.
As Microsoft did not have an operating system to sell, they bought Seattle Computer Product's 86-DOS which had been written by Tim Paterson earlier that year (86-DOS was also known as QDOS, Quick & Dirty Operating System; it was a more-or-less 16 bit version of CP/M). The rights were actually bought in July 1981.