2. Suanpan (the number represented on this abacus is 6,302,715,408) Yazu Arithmometer. Patented in Japan in 1903. Note the lever for turning the gears of the calculator.
Earliest true hardware 3. 1801: Punched card technology IBM 407 Accounting Machine (tabulator) Punched card system of a music machine, also referred to as Book music 4. ENIAC performed ballistics trajectory calculations with 160 kW of power ENIAC (Electronic Numerical Integrator and Computer) 5. First-generation machines 6. 1. Use of vacuum tubes 2. Big & Clumsy 3. High Electricity Consumption 4. Programming in Mechanical Language 5. Larger AC were needed 6. Lot of electricity failure occured First-generation machines(1942-1960) Other computers of first generation are: UNIVAC-1, IBM-701 and IBM-650, Datamatrix-1000, EDSAC, MARK II, MARK III. 7.
8. 1. Transistors were used 2. Core Memory was developed 3. Faster than First Generation computers 4. First Operating System was developed 5. Programming was in Machine Language & Aseembly Language 6. Magnetic tapes & discs were used 7. Computers became smaller in size than the First Generation computers 8. Computers consumed less heat & consumed less electricity FEATURES OF SECOND GENERATION (1960-1965) Computers of Second Generation: CDC-3600, IB-700, IBM-1401, ICL-1901, UNIVAC-1108, IBM-7094, RCA-501, CDC-1604 9. 1. Integrated circuits developed 2. Power consumption was low 3. SSI & MSI Technology was used 4. High level languages were used Computers of Third Generation:CDC-1700, ICL-2903, PDP-11/45 THIRD GENERATION FEATURES (1965-1975) 10. 1. LSI & VLSI Technology used 2. Development of Portable Computers 3. RAID Technology of data storage 4. Used in virtual reality, multimedia, simulation 5. Computers started in use for Data Communication 6. Different types of memories with very high accessing speed & storage capacity
Computers of Fourth Generation: Intel-4004, Apples I & II, DCM-Spectrum FOURTH GENERATION COMPUTERS(1975 To date) 11. 1. Used in parallel processing 2. Used superconductors 3. Used in speech recognition 4. Used in intelligent robots 5. Used in artificial intelligence FIFTH GENERATION COMPUTERS 12. 13.