- The unit of frequency is Hertz
- The unit of resistance is Ohm
- The device which makes or breaks a circuit is Switch
- The path of an electric current is known as a Circuit
- Device which opposes the flow of electric current is known as Resistor
- Arc Lamp was invented by C.F.Brush
- Television was invented by J.L.Baird
- Transistor was invented by J.Bardeen,W.Shockley and W.Brattain
- The unit of wavelength of light is Angstrom
- A device which converts light into electricity is known asPhoto cell
- Hertz was the first to discover Radio waves
- Marconi invented Radio
- In 1901,Marconi beamed a signal from Cornwall in England to Newfoundland
- Thomas Edison was an American inventor
- A glass tube with two electrodes is called a Diode
- Lee de Forest was an American scientist
- Lee de Forest discovered the Triode
- Radio and television transmit signals using Electromagnetic waves
- To turn pictures into electrical signals,television Cameras rely on Photo-electric effect
- Transistor was invented in the year 1948
- The first electronic components invented were the Thermionic valves
- Microchip was invented in the year 1958
- Microchip was invented by Jack Kilby
- The microchip invented first was also the first Integrated circuit
- Silicon and germanium are ideal examples of Semi conductors
- LED stands for Light Emitting Diode
- The first computer was invented in the year 1834
- The first computer was invented by Charles Babbage
- The first computer invented was called Analytical Engine
- In the present day electronic machines,computers function as Artificial brains
- CAD means Computer Aided Design
- CPU stands for Central Processing Unit
- RAM stands for Random Access Memory
- J.J. Thomson was a British physicist
- In 1897,J.J.Thomson discovered Electrons
- A device used for increasing the strength of electric signal is called Amplifier
- The height of a wave is called Amplitude
- An electron carries a charge Negative
- In a transistor,a base is the Filling in the semiconductor sandwich
- The tube behind the screen in TVs and most computers is called Cathode Ray Tube
- The force which makes an electric current is called Electromotive Force
- Device used for measuring small amounts of electric current is called Galvanometer
- Sound too low to be heard by humans is called Infrasound
- VDU stands for Visual Display Unit
- One kilobyte is approximately 1000 bytes
- DOS stands for Disk Operating System
- WORD STAR is a popular Word processing programme
- WORD STAR was developed by Micro pro Company
- PC stands for Personal Computer
- ALU stands for Arithmetic Logic Unit
- The VDU and Keyboard together form a TERMINAL
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- A printer which uses light to transfer the image to paper is the Laser Printer
- Memory which retains all its contents even after the power is turned off is known as Non-Volatile Memory
- The result that is generated by the computer after processing the information provided to it is known as Output
- Electronic mail is more popularly known as E-Mail
- PILOT stands for Programmed Inquiry Learning Or Teaching
- PILOT was developed by Doug Engelbardt
- IQL stands for Interactive Query Language
- LOGO was developed by Dr.seymour Papert
- CAL stands for Computer Assisted Learning
- APT stands for Automatically Programmed Tooling
- `C'language was invented by Dennis M.Ritchie
- Modula-2 was developed by Niklaus Wirth
- Terminals that have their own memory are called Smart terminals
- The memory that needs electric power to sustain its contents is known asVolatile Memory
- MOS stands for Metallic Oxide Semiconductors
- Dvorak key board was designed by August Dvorak
- A simple device which functions as a simpler alternative to the keyboard is the Mouse
- Automatic drawing input device is called Scanner
- In the second generation computers,magnetic cores were used as Main Memory Devices
- LCD stands for Liquid Crystal Display
- RADAR stands for Radio Detection and Ranging
- RADAR works on the principle of Echo
- software-in-Hardware modules are called Firmware
- A device by which any microcomputer can use ordinary television set for producing output is called RF modulator
- EDSAC stands for Electronic Delayed Storage Automatic Computer
- EDVAC stands for Electronic Discrete Variable Automatic Computer
- EDSAC was developed in the year 1949
- EDVAC was developed in the year 1952
- ENIAC stands for Electronic Numerical Integrator and Calculator
- The most successful computing device in the ancient time was Abacus
- Use of some mechanism for the operation of a machine is known as Automation
- Radar contact with the moon was first made in 1945
- Radar contact with Venus was first made in 1961
- A system in which information is displayed on a television screen is known as Video Text System
- A modern means of communication in which the information is stored in a computer at a TV station is known as Teletext
- Global communication became possible by using Satellites
- Morse code was invented by Samuel Morse
- The code used in a teleprinter is the Baudot Code
- Teleprinter exchange is popularly known as Telex
- A device which converts sound waves into electrical waves is called Microphone
- AVC stands for Automatic Volume Control
- The device used to measure wavelengths of radio waves is Wavemeter
- A hollow metallic tube used in place of wire in electric circuits carrying high frequency currents is called Waveguide
- An instrument used to measure the intensity of radiations is the Radiometer
- An instrument used to measure electrical voltage is the Voltmeter
- VTVM stands for Vacuum Tube Volt Meter
- A circuit which maintains a constant voltage is called Voltage Stabilizer
- SCR stands for Silicon Controlled Rectifier
- A device used to increase or decrease electric voltageis called a Transformer
- A magnetic tape that records both audio and video signals is called a Video Tape
- The first electronic calculator was manufactured in 1963 by Bell Punch Company,USA
- MASER stands for Microwave Amplification by stimulated Emission of Radiation
- A computer which can handle a large volume of numbers is called a Number cruncher
- POST stands for Power on Self Test
- POST is a test carried out just after the computer has been Switched on
- An index of the files stored on a disk is called Directory
- CP/M stands for Control program for Microcomputers
- CP/M was developed by digital Research Inc.,USA
- MVS stands for Multiple Virtual Storage Operating System
- MVS is used in Mainframe computers
- The process of starting a computer is called Booting
- A group of four binary digits is called a NIBBLE
- BPI stands for Bit per Inch
- A smart card is a multifunctional microprocessor
- LIPS stands for Logical Inferences Per Second
- A computerized machine is normally called a Robot
- A robot is a machine directed by a Computer
- A robot which resembles a human being is called an Android
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