Electronics and Computers

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 as Photo 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 year1948

The first electronic components invented were the Thermionic valves

Microchip was invented in the year1958

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 year1834

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 forVisual Display Unit

One kilobyte is approximately1000 bytes

DOS stands for Disk Operating System

WORD STAR is a popularWord processing programme

WORD STAR was developed byMicro pro Company

PC stands forPersonal Computer 50ALU stands for Arithmetic Logic Unit

The VDU and Keyboard together form a TERMINAL

The speed of the dot matrix printers is measured by CPS which stands forcharacters per second

The speed of the line printers is measured by LPM which stands forLines per second

DBMS stands for Database Management System

IBM is a famous computer company.

IBM stands for International Business Machines Corporation

ROM stands for Read Only Memory

The actual machine of the computer is commonly known as Hardware

The programs run on the computer are commonly known as Software

All the output which is printed on paper is called Hard Copy

The number of pixels on a computer screen determines a screes's Resolution

A processor's speed is measured in Megahertz

A software that assists the computer in performing instructions, is called assystem software

CAM stands forComputer Aided Manufacturing

DPI stands for Dots per Inch

DTP stands forDesk Top Publishing

EPROM stands forerasable and Programmable Read only Memory

A magnetic storage disk made out of a thin piece of plastic is called Floppy Disk

A pictorial representation of the step by step sequence for solving a problem is known as a Flow Chart

A measure of storage capacity equal to one thousand megabytes is one Gigabyte

A variable whose value is accessible throughout the program is called Global Variable

A huge, worldwide network of computers that communicate with each other, allowing global communications between users is known popularly known as Internet

KB stands for Kilobyte

LAN stands for Local Area Network

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 as Volatile 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 in1961

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 isWavemeter

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 forPower 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

 PL/1 stands for Programme Language-1

The language PL/1 has combined features of COBOL and FORTRAN

BASIC stands for Begineers All Purpose Symbolic Instruction Code

COBOL stands for Common Business Oriented Language

ALGOL stands for Algorithmic Language

ALGOL was developed in the early 1960s in Europe

COBOL was first introduced in the year 1961

FORTRAN stands for Formula Translation

FORTRAN was developed and introduced by IBM in the year 1957

 PL/1 was introduced in the 1960s by IBM

COMAL stands for Common Algorithmic Language

BASIC was developed by John Kemeny and Thomas Kurtz

SNOBOL stands for String Oriented Symbolic Language

SNOBOL was developed in 1962

LISP stands for List Processing

Language LISP was developed by John McCarthy

 Loud speaker was invented by Rice Kellogg

PROM stands for Programmable Read Only Memory

 Two types of RAM chips are Dynamic static

 Data is fed into the computer by first converting it into Binary codes