Search results
Results from the WOW.Com Content Network
Drum memory of a Polish ZAM-41 computer Drum memory from the BESK computer, Sweden's first binary computer, which made its debut in 1953. Drum memory was a magnetic data storage device invented by Gustav Tauschek in 1932 in Austria. [1] [2] Drums were widely used in the 1950s and into the 1960s as computer memory.
The IBM 2301 is a magnetic drum storage device introduced in the late 1960s to "provide large capacity, direct access storage for IBM System/360 Models 65, 67, 75, or 85." The vertically mounted drum rotates at around 3,500 revolutions per minute, and has a head-per-track access mechanism and a capacity of 4 MB.
Close-up of bi-quinary indicators Memory drum from an IBM 650 Side view of an IBM 650 Console Unit. First computer in Spain (1959) now at National Museum of Science and Technology in A Coruña. The IBM 650 Magnetic Drum Data-Processing Machine is an early digital computer produced by IBM in the mid-1950s.
It is a serial-architecture machine, in which the main memory is a magnetic drum. It uses the drum as a recirculating delay-line memory, in contrast to the analog delay line implementation in other serial designs. Each track has a set of read and write heads; as soon as a bit was read off a track, it is re-written on the same track a certain ...
Later, optical disc drives and flash memory units are also classified as DASD. [2] [3] The term DASD contrasts with sequential access storage device such as a magnetic tape drive, and unit record equipment such as a punched card device. A record on a DASD can be accessed without having to read through intervening records from the current ...
Get the Moses Lake, WA local weather forecast by the hour and the next 10 days.
IBM 305 at U.S. Army Red River Arsenal, with two IBM 350 disk drives in the foreground RAMAC mechanism at Computer History Museum. The IBM 350 disk storage unit, the first disk drive, was announced by IBM as a component of the IBM 305 RAMAC computer system on September 14, 1956.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!