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The 4004 was released in 16-pin ceramic DIP packaging on November 15th, 1971. The 4004 was the first computer processor designed and manufactured by chip maker Intel, which previously made semiconductor memory chips.

The chief designers of the chip were Ted Hoff and Federico Faggin of Intel and Masatoshi Shima of Busicom (later of ZiLOG).

Originally designed for the JapaneseJapan (, Nippon/Nihon literally "the origin of the sun") is a country in East Asia situated on a chain of islands east of the Asian continent on the western edge of the Pacific Ocean. The largest of these islands are, from north to south, Hokkaido , Honsh company Busicom to be used in their line of calculatorA calculator is a device for performing numerical calculations. It should not be confused with a calculating machine. Nowadays many people have a calculator with them as part of their mobile phone and/or personal digital assistant. Engineers and accountans, the 4004 was also provided with a family of custom support chips (e.g., each "Program ROMRead-only memory (ROM is used as a storage medium in computers. Because it cannot (easily) be written to, its main uses lie in the distribution of software that is very closely related to hardware, and not likely to need frequent upgrading. One common use" internally latched for its own use the 4004's 12-bit program address, which allowed 4 KBThe kilobyte comes in two flavours, depending on the context in which it is used, meaning either 1,000 or 1,024 bytes. The kilobyte (kB) This uses the SI prefix kilo, and simply refers to 1,000 bytes (as a kilometre equals 1,000 metres). This is the notat memory access from the 4-bit address busAn address bus is (part of) a computer bus, used by CPUs or DMA-capable units for communicating the physical addresses of computer memory elements/locations that the requesting unit wants to access (read/write). The width of an address bus, along with the if all 16 ROMs were installed). The 4004 circuit was built of 2,300 transistorThe transistor is the key active component in practically all modern electronics. The transistor is a solid state semiconductor device used for amplification and switching. In essence, it has three terminals. A current or voltage applied through/across tws, and was followed the next year by the first ever 8-bit8-bit refers to the number of bits used in the data bus of a computer. It is the number of bits of data transferred on each read or write of the memory, and the number of bits used internally in the CPU to carry out processing. Similarly, a 4-bit CPU woul microprocessor, the 3,300 transistor 8008The Intel 8008 was an early microprocessor designed and manufactured by Intel, and introduced in April, 1972. It was originally commissioned by Computer Terminal Corporation for use in its Datapoint 2200 programmable terminal, but because the chip was del (and the 4040, a revised 4004).

As its fourth entry in the microprocessor market, Intel released the CPU that started the microcomputer revolution — the 8080.