Q. The digital computer was developed primarily in
- USSR
- Japan
- USA
- UK
Answer: USA
Charles Babbage, an English mechanical engineer and polymath, originated the concept of a programmable computer. Considered the "father of the computer", he conceptualized and invented the first mechanical computer in the early 19th century.
John Vincent Atanasoff (October 4, 1903 – June 15, 1995) was an American-Bulgarian physicist and inventor, best known for being credited with inventing the first electronic digital computer.
History of computing hardware
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, LSI integrated circuits) | Mainframes | IBM 7090, IBM 7080, IBM System/360, BUNCH |
Minicomputer | HP 2116A, IBM System/32, IBM System/36, LINC, PDP-8, PDP-11 | |
Desktop Computer | Programma 101, HP 9100 | |
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 | 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 |
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