Before revision: 8-bit slice: Four-Phase Systems AL1 ( considered to be the first microprocessor used in a commercial product, now discontinued) Texas Instruments SN54AS888 / SN74AS888 Fairchild 100K ZMD (1978/1981), cascadable up to 32 bit 16-bit slice: AMD Am29100 family Synopsys 49C402 ZFT Robotron/ZFTM Dresden (1979/1982), unreleased Historical necessity Bit slicing, although not called that at the time, was also used in computers before large-scale integrated circuits (LSI, the predecessor to today's VLSI, or very-large-scale integration circuits).
After revision: 1969,8-bit slice: Four-Phase Systems AL1 ( considered to be the first microprocessor used in a commercial product, now discontinued) Texas Instruments SN54AS888 / SN74AS888 Fairchild 100K ZMD (1978/1981), cascadable up to 32 bit 16-bit slice: AMD Am29100 family Synopsys 49C402 ZFT Robotron/ZFTM Dresden (1979/1982), unreleased Historical necessity Bit slicing, although not called that at the time, was also used in computers before large-scale integrated circuits (LSI, the predecessor to today's VLSI, or very-large-scale integration circuits).