A History of Early Microcontrollers, Part 4: The Intel 8048 and 8748
Intel announced the first commercially successful microprocessor, the 4004, in late 1971. By 1974 Intel had introduced four microprocessors: the 4-bit, “low-end” 4004 and the upgraded 4040, and the 8-bit 8008 and 8080. Intel’s 4-bit 4004 and 4040 microprocessors were used primarily for embedded control applications where I/O capabilities and performance and lower part cost…
Source: eejournal.com