|Manufacturer:||International Business Machines|
|Year Announced:||May, 1954|
|Year Discontinued:||April, 1960|
|Word Size:||36 bits|
|Logic Type:||vacuum tubes|
|Clock Speed:|| 24 μsec (basic add instruction)|
240 μsec (basic multiply instruction)
|Memory Speed:||12 μsec|
The IBM 704 was IBM's first commercially successful vacuum tube scientific mainframe (built at a time when computers for scientific and business computing used separate instruction sets). It was announced in May, 1954; 136 were sold.
The major advances over its predecessor, the IBM 701, included core memory, instead of the Williams tubes previously used for main memory in the 701; and support for floating point in hardware (supposedly the first mass-produced machine to do so).
- Charles J. Bashe, Lyle R. Johnson, John H. Palmer, Emerson W. Pugh, IBM's Early Computers, MIT Press, Cambridge, 1986