First Generation of the Computers
This Computers used vacuum tubes for circuitry.
Total 17,468 Vacuum tubes used in this computers.
This Computers used magnetic drums for memory.
A magnetic drum also referred to as drum, is a metal cylinder coated with magnetic iron-oxide material on which data and programs can be stored.Magnetic drums were once use a primary storage device but have since been implemented as auxiliary storage devices.
Input was based on punched cards and paper tape in this computers.These cards allowed companies to store and access information by entering the card into the computer.
Output was displayed on print-outs.
The UNIVAC and ENIAC computers are examples of first-generation computing devices.
The UNIVAC was the first commercial computer delivered to a business client, the U.S. Census Bureau in 1951.
The ENIAC (Electronic Numerical Integrator And Computer) the world's first operational electronic digital computer, developed by Army Ordnance to compute World War II ballistic firing tables. The ENIAC, weighing 30 tons, using 200 kilowatts of electric power and consisting of 18,000 vacuum tubes, 1,500 relays, and hundreds of thousands of resistors,capacitors, and inductors, was completed in 1945. In addition to ballistics, the ENIAC's field of application included weather prediction, atomic-energy calculations, cosmic-ray studies, thermal ignition,random-number studies, wind-tunnel design, and other scientific uses. The ENIAC soon became obsolete as the need arose for faster computing speeds.
First generation computers relied on machine language, the lowest-level programming language understood by computers, to perform operations, and they could only solve one problem at a time, and it could take days or weeks to set-up a new problem.
Disadvantages:-
1) They were very expensive to operate and in addition to using a great deal of electricity, generated a lot of heat.
2) The computers were large size and very costly.
3) They were difficult to program and use.
4) They heated very soon due to thousands of vacuum tubes.
5) Very slow speed.
6) Non-portable.
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