Subject: Computer

It is the first electro-mechanical computer developed by Howard Aiken in 1937. The machine was 5ft long, 3ft wide and 8ft high and used in 18000 vacuum tubes. The machine took 1 second to perform 3 mathematical calculations.

In 1942, J.V. Atanasoft and Clifford Berry in 1942 developed Atanasoff Berry computer. It was developed to solve simultaneous equation.

In 1946, this machine was developed by John Mauchlay and J. Presper Eckert. It used decimal number system for calculation. This machine can calculate 300 times faster than any other machine of that time. This machine was used in military operation for firing ballistic missiles.

This machine was developed by Maurice Wilkes and his team in 1949. 3000 vacuum tubes and consumed 30KW electric power.

This machine was developed by John Mauchlay, John Presper Eckert with assistance of John Von Neumann in 1952. This machine was the first machine that could store programs in it with the help of binary digits.

This machine was first developed by John Mauchlay and J. Presper Eckert in 1951. This was the first computer developed for commercial use.

- The first computer brought in Nepal. (IBM 1401)

- The first mechanical device using strings on beads. (Abacus)

- Father of computer science. (Charles Babbage)

- The first automatic electromechanical computer. (Mark-1)

- The first commercially used general purposed computer. (UNIVAC)

- The founder of IBM Company USA. (Dr. Herman Hollerith)
- The person who gave stored program concept. (John Von Neuman)
- The main component used in third generation computers. (Integrated Circuit)
- The computer generation in which laptops and palmtops are being developed. (Fourth generation)
- The branch of computer science that will possess reasoning power as human being. (AI)

- Bit : Binary Digit
- GIGO : Garbage in Garbage Out
- CPU : Central Processing Unit
- IPM : Information Processing Machine
- MIPS : Millions of Instructions Per Second
- ECG : Eco Cardio Graphy
- ATM : Automatic Teller Machine
- ICU : Intensive Care Unit
- CD-ROM : Compact Disk Read Only Memory
- DVD : Digital Versatile Disk
- EDSAC : Electronic Delay Storage Automatic Computer
- EDVAC : Electronic Discrete Variable Automatic Computer
- UNIVAC : Universal Automatic Computer
- ENIAC : Electronic Numerical Integrator And Calculator
- ASCII : American Standard Code for Information Interchange
- E BCDIC : Extended Binary Coded Decimal Interchange Code
- BCD : Binary Coded Decimal
- IC : Integrated Circuit
- LSI : Large Scale Integration
- VLSI : Very Large Scale Integration
- ULSI : Ultra Large Scale Integration
- PC : Personal Computer
- IBM : International Business Machines
- ASCC : Automatic Sequence Controlled Calculator
- ABC : Atanasoff Berry Computer
- PDA : Personal Digital Assistance
- GaAs : Gallium Arsenide

- Mark-I is the first electro-mechanical computer developed by Howard Aiken in 1937.
- In 1942, J.V. Atanasoft and Clifford Berry in 1942 developed Atanasoff Berry computer.
- EDVAC was developed by John Mauchlay, John Presper Eckert with assistance of John Von Neumann in 1952.
- UNIVAC was first developed by John Mauchlay and J. Presper Eckert in 1951.
- EDSAC was developed by Maurice Wilkes and his team in 1949.

- It includes every relationship which established among the people.
- There can be more than one community in a society. Community smaller than society.
- It is a network of social relationships which cannot see or touched.
- common interests and common objectives are not necessary for society.

History of computer is based on mainly calculation devices. Therefore it is classified into the following three eras:

- Mechanical era.
- Electro-mechanical era.
- Electronic era.

Mark-I was the first electro mechanical computer developed by Howard Aiken. It was named as ASCC and was 8 ft high, 51 ft long and 2ft wide. It used more than 7 lakh 50 thousand parts and weighed more than 32 tons.

Atanasoff Berry computer was made to solve multiple equations at the same time.

Though Atanasoff Berry computer was the best computer at that time it could not use decimal number system calculations. ENIAC was able to calculate using decimal number system and was 300 times fadter than Atanasoff Berry computer.

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