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・ integrated information technology
・ integrated modelling support environment
・ integrated project support environment
・ integrated services digital network
・ integrated systems architecture
・ integrated systems laboratory
・ integration
・ integration testing
・ integrity constraint
・ intel
・ intel 4004
・ intel 4040
・ intel 486
・ intel 486dx
・ intel 486sx
・ intel 487sx
・ intel 8008
・ intel 80186
・ intel 80188
・ intel 80286


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Intel 4004 : FOLDOC
Intel 4004
The world's first microprocessor, released in 1971. The 4004 contained 2300 transistors (compared with 5.5 million in the 1996 Pentium Pro) and was intended for use in a calculator. It processed data in 4 bits, but its instructions were 8 bits long. Program and Data memory were separate, it had 1 kilobyte of data memory and a 12-bit PC for 4K of program memory (in the form of a 4 level stack, used for CALL and RET instructions). There were also sixteen 4-bit (or eight 8-bit) general purpose registers. The 4004 had 46 instructions.
(1997-03-30)



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