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==Short bio==
The '''IBM 604''' was a [[plug-board]] programmable Electronic Calculating Punch introduced in [[1948]], and was a machine on which considerable expectations for the future of [[International Business MachinesIBM]] were pinned and in which a corresponding amount of planning talent was invested.
Mexican mathematics grad school student.
I'm also a major contributor of [http://planetmath.org Planetmath], the free mathematics encyclopedia.
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==Images uploaded to wikipedia==
Most of the circuitry was based on modifications of circuit designs used in the earlier [[IBM 603|603]] Electronic Multiplier and was packaged in small one tube replaceable standardized modules. Clock speed was increased from the 603's rate of 35kHz to 50kHz. It performed fixed point addition, subtraction, multiplication and division using [[Binary coded decimal]]. Initial versions supported 40 program steps, but this was soon expanded to 60. Processing was still locked to the reader/punch cycle time, thus program execution had to complete within the time between a card leaving the read station and entering the punch station!
* [[Image:Drini-nonuniformconvergence.png|thumb|300px|left|Used on [[Uniform convergence]]]]
* [[Image:Drini-conjugatehyperbolas.png|thumb|300px|left|Used on [[Hyperbola]]]]
==Personal reminder==
In [[1949]] a modified version of the 604, connected to an accounting machine, was introduced as the [[IBM CPC|Card Programmed Electronic Calculator]]. This machine read its program steps from punch cards instead of a plug-board.
{{Opentask}}
=== External Link ===
[http://ed-thelen.org/comp-hist/IBM-604.html http://ed-thelen.org/comp-hist/IBM-604.html]
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