The 555 timer IC
The 741 operational amplifier
7400 series TTL logic building blocks
4000 series, the CMOS counterpart to the 7400 series (see also: 74HC00 series)
Intel 4004, the world's first microprocessor, which led to the famous 8080 CPU and then the IBM PC's 8088, 80286, 486 etc.
The MOS Technology 6502 and Zilog Z80 microprocessors, used in many home computers of the early 1980s
The Motorola 6800 series of computer-related chips, leading to the 68000 and 88000 series (used in some Apple computers and in the 1980s Commodore Amiga series).
The LM-series of analog integrated circuits.