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the first mass-produced computer, still with [https://en.wikipedia.org/wiki/Vacuum_tube vacuum tubes]. It used [https://en.wikipedia.org/wiki/Floating_point floating point] arithmetic hardware and [https://en.wikipedia.org/wiki/Core_memory Magnetic core memory], three [https://en.wikipedia.org/wiki/Index_register index registers], [https://en.wikipedia.org/wiki/36-bit 36-bit] [[Word|words]]. The IBM 704 was able to process about 40,000 instructions per second, and was introduced in 1954. The instruction format was 3-bit prefix, 15-bit decrement, 3-bit tag, and 15-bit address. The prefix field specified the class of instruction, the decrement field often contained an immediate operand, or was used to further define the instruction type. The tag bits specified any combination of three index registers, in which the contents of the registers were subtracted from the address to produce an effective address of an memory operand. The programming languages [[Fortran]] and [[LISP]] were first developed for the 704. In 1957 [[Alex Bernstein]] et al. wrote the first complete chess program for the IBM 704, [[The Bernstein Chess Program]].

from ''[[Artificial Intelligence#MachinesWhoThink|Machines Who Think]]'' <ref>[https://en.wikipedia.org/wiki/Pamela_McCorduck Pamela McCorduck] ('''2004'''). ''[[Artificial Intelligence#MachinesWhoThink|Machines Who Think: A Personal Inquiry into the History and Prospects of Artificial Intelligence]]''. [https://en.wikipedia.org/wiki/A_K_Peters A. K. Peters] (25th anniversary edition)</ref> <ref>[http://www.gettyimages.de/search/2/image?phrase=IBM+704&editorialproducts=timelife&family=editorial Photos] with [https://en.wikipedia.org/wiki/Edward_Lasker Edward Lasker] by [https://en.wikipedia.org/wiki/Andreas_Feininger Andreas Feininger], [https://en.wikipedia.org/wiki/Getty_Images Getty Images]</ref>:

[https://en.wikipedia.org/wiki/Life_(magazine) Life magazine] came asking for photographs of [[Alex Bernstein|Bernstein]] sitting at the computer, and wondered if they could get [https://en.wikipedia.org/wiki/Bobby_Fischer Bobby Fischer] to pose too. He was in his early teens at the time, but shrewd enough, and said he would for a fee of $2500, Bernstein recalls:

* [http://www.columbia.edu/acis/history/704.html The IBM 704] by [http://www.columbia.edu/~fdc/ Frank da Cruz], [[Columbia University]]

* [http://www.quadibloc.com/comp/cp0309.htm From the IBM 704 to the IBM 7094] by [http://www.quadibloc.com/ John J. G. Savard]

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'''[[Hardware|Up one Level]]'''