Search results
Results From The WOW.Com Content Network
The left end consisted of electromechanical computing components. The right end included data and program readers, and automatic typewriters. The Harvard Mark I, or IBM Automatic Sequence Controlled Calculator (ASCC), was one of the earliest general-purpose electromechanical computers used in the war effort during the last part of World War II.
The new machine, called the IBM Selective Sequence Electronic Calculator (SSEC), was ready to be installed by August 1947. [9] Watson called such machines calculators because computer then referred to humans employed to perform calculations and he wanted to convey the message that IBM's machines were not designed to replace people. Rather they ...
This computer was originally called the ASCC (Automatic Sequence Controlled Calculator) and later renamed Harvard Mark I. With engineering, construction, and funding from IBM, the machine was completed and installed at Harvard in February 1944. [5] Richard Milton Bloch, Robert Campbell and Grace Hopper joined the project later as programmers. [6]
The IBM Automatic Sequence Controlled Calculator was turned over to Harvard University, which called it the Harvard Mark I. It was designed by Howard Aiken and his team, financed and built by IBM—it became the second program-controlled machine (after Konrad Zuse's). The whole machine was 51 feet (16 m) long, weighed 5 (short) tons (4.5 tonnes ...
Dreyer Fire Control Table, 1911 – Royal Navy fire control computer; Marchant Calculator, 1918 – Most advanced of the mechanical calculators. The key design was by Carl Friden. Admiralty Fire Control Table, 1922 – Royal Navy advanced fire control computer. [dubious – discuss] István Juhász Gamma-Juhász (gun director) [10] [11] [12 ...
Some early computers, such as the 1944 IBM Automatic Sequence Controlled Calculator (Harvard Mark I) received program instructions from a paper tape punched with holes, similar to Jacquard's string of cards. Later computers executed programs from higher-speed memory, though cards were commonly used to load the programs into memory.
IBM built the Automatic Sequence Controlled Calculator, an electromechanical computer, during World War II. It offered its first commercial stored-program computer, the vacuum tube based IBM 701, in 1952. The IBM 305 RAMAC introduced the hard disk drive in 1956.
An accessible book of recollections (sometimes with errors), with photographs and descriptions of many unit record machines. The chapter It all adds Up describes IBM tabulators and accounting machines. Kistermann, F.W. (Summer 1995). "The way to the first automatic sequence-controlled calculator: the 1935 DEHOMAG D 11 tabulator".