| First generation (mechanical/electromechanical) | Calculators | Pascal's calculator, Arithmometer, Difference engine,Quevedo's analytical machines |
| Programmable devices | Jacquard loom, Analytical engine, IBM ASCC/Harvard Mark I, Harvard Mark II, IBM SSEC, Z1, Z2, Z3 |
| Second generation (vacuum tubes) | Calculators | Atanasoff–Berry Computer, IBM 604, UNIVAC 60, UNIVAC 120 |
| Programmable devices | Colossus, ENIAC, Manchester Small-Scale Experimental Machine, EDSAC, Manchester Mark 1, Ferranti Pegasus,Ferranti Mercury, CSIRAC, EDVAC, UNIVAC I, IBM 701,IBM 702, IBM 650, Z22 |
| Third generation (discrete transistors and SSI, MSI, LSIintegrated circuits) | Mainframes | IBM 7090, IBM 7080, IBM System/360, BUNCH |
| Minicomputer | PDP-8, PDP-11, IBM System/32, IBM System/36 |
| Fourth generation (VLSI integrated circuits) | Minicomputer | VAX, IBM System i |
| 4-bit microcomputer | Intel 4004, Intel 4040 |
| 8-bit microcomputer | Intel 8008, Intel 8080, Motorola 6800, Motorola 6809, MOS Technology 6502, Zilog Z80 |
| 16-bit microcomputer | Intel 8088, Zilog Z8000, WDC 65816/65802 |
| 32-bit microcomputer | Intel 80386, Pentium, Motorola 68000, ARM |
| 64-bit microcomputer[65] | Alpha, MIPS, PA-RISC, PowerPC, SPARC, x86-64, ARMv8-A |
| Embedded computer | Intel 8048, Intel 8051 |
| Personal computer | Desktop computer, Home computer, Laptop computer,Personal digital assistant (PDA), Portable computer,Tablet PC, Wearable computer |
| Theoretical/experimental | Quantum computer, Chemical computer, DNA computing,Optical computer, Spintronics based computer |
Impact of computers on society
Security and privacy
Ergonomics
Applications of computers
Physical Structure and logical structure of the computer
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