| IntroductionDate | Clock Speeds | Bus Width | Number ofTransistors | AddressableMemory | VirtualMemory | BriefDescription |
| 4004
| 11/15/71 | 108 KHz | 4 bits | 2,300(10 microns) | 640 bytes | | First microcomputer chip,Arithmetic manipulation |
| 8008
| 4/1/72 | 108 KHz | 8 bits | 3,500 | 16 KBytes | | Data/character manipulation |
| 8080
| 4/1/74 | 2 MHz | 8 bits | 6,000(6 microns) | 64 KBytes | | 10X the performance of the 8008 |
| 8086
| 6/8/78 | 5 MHz8 MHz10 MHz | 16 bits | 29,000(3 microns) | 1 Megabyte | | 10X the performance of the 8080 |
| 8088
| 6/1/79 | 5 MHz8 MHz | 8 bits | 29,000(3 microns) | | | Identical to 8086 except for its 8-bit external bus |
80286
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