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Saturday, 23 June 2018

The digital computer was developed primarily in

  By GK Planet Team       Saturday, 23 June 2018
Q. The digital computer was developed primarily in
  1. USSR
  2. Japan
  3. USA
  4. 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)CalculatorsPascal's calculatorArithmometerDifference engineQuevedo's analytical machines
Programmable devicesJacquard loomAnalytical engineIBM ASCC/Harvard Mark IHarvard Mark IIIBM SSECZ1Z2Z3
Second generation (vacuum tubes)CalculatorsAtanasoff–Berry ComputerIBM 604UNIVAC 60UNIVAC 120
Programmable devicesColossusENIACManchester Small-Scale Experimental MachineEDSACManchester Mark 1Ferranti PegasusFerranti MercuryCSIRACEDVACUNIVAC IIBM 701IBM 702IBM 650Z22
Third generation (discrete transistors and SSI, MSI, LSI integrated circuits)MainframesIBM 7090IBM 7080IBM System/360BUNCH
MinicomputerHP 2116AIBM System/32IBM System/36LINCPDP-8PDP-11
Desktop ComputerProgramma 101HP 9100
Fourth generation (VLSI integrated circuits)MinicomputerVAXIBM System i
4-bit microcomputerIntel 4004Intel 4040
8-bit microcomputerIntel 8008Intel 8080Motorola 6800Motorola 6809MOS Technology 6502Zilog Z80
16-bit microcomputerIntel 8088Zilog Z8000WDC 65816/65802
32-bit microcomputerIntel 80386PentiumMotorola 68000ARM
64-bit microcomputerAlphaMIPSPA-RISCPowerPCSPARCx86-64ARMv8-A
Embedded computerIntel 8048Intel 8051
Personal computerDesktop computerHome computerLaptop computer, Personal digital assistant (PDA), Portable computerTablet PCWearable computer
Theoretical/experimentalQuantum computerChemical computerDNA computingOptical computerSpintronics-based computer
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