First in computer engineering is almost always a controversial topic. Historically, many products were often designed around the same time by different organizations and were introduced around the same time. Below is a list of "firsts".

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First Microprocessor

Intel 4004

The first microprocessor is a subject of heated debate. Below is a number of popular candidates:

• AiResearch's MP944
• Intel's 4004
• Fairchild's PPS-25
• Texas Instruments' TMX1795

With development starting in 1968 and completing around June of 1970, the MP944 chipset is one of the earliest examples of a complete VLSI micro-computer system chipset. The MP944 is 20-bit microprocessor designed by Garrett AiResearch specifically for the Grumman F-14 Tomcat's Central Air Data Computer. The project remained classified for over 40 years. In early 1970 at least three additional microprocessors were already under development. Intel started working on the 4004 in April 1970. According to a number of source, the Fairchild's PPS-25 was initially introduced in the second quarter 1971. This would place it 2 quarters ahead of Intel's 4004 which was introduced in November 1971. TI announced, albeit never actually commercialized, the TMX1795 which is effectively TI's own implementation of Intel's 8008 - both were based on the same specifications drafted by the Computer Terminal Corporation.

First Commercial Microprocessor

From the list above, two processors might qualify for the "first commercial microprocessor":

• Intel's 4004
• Fairchild's PPS-25

First CMOS Microprocessor

The first CMOS microprocessor is the 8-bit RCA 1802 introduced in 1974.

First N-bit Microprocessor

Title	Year	Designer	Processor	Note
First 4-bit Microprocessor	1971	Intel	4004
		Fairchild	PPS-25
First 8-bit Microprocessor	1971/2	Intel	8008
		TI	TMX1795	Never commercialized.
First 16-bit Microprocessor	1973	National	IMP-16
First 32-bit Microprocessor	1979	Bell Labs	Bellmac-32	Never commercialized.
	1981	Intel	APX 432
First 64-bit Microprocessor	1991	MIPS Technologies	R4000

First Dual-Core

Original COP2440 Block Diagram

The first known example of a commercial dual-core microprocessor is the COP II COP2404 (and 2440/41/42 variants) announced in 1981 and released the following year. The chip was a complete a single-chip dual-core processor.

First Neural Processor

The first commercial analog neural processor is the ETANN introduced by Intel. Below is a number of candidates for first commercial (digital/analog):

• Intel ETANN
• Fujitsu TDM Neurochip
• Micro Devices MD-1220
• American NeuraLogix NLX-420