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What is a Joystick ? Joystick is a pointing device which is works on the same principle of track ball. It contains a stick which is placed on the spherical ball. The stick is used to move the cursor at desired position left or right or backwardor forward. It also contain button that is clicked…
What is a Track Ball ? What is Track Ball – Trackball is a pointing device which is similar to a mouse. A ball is placed on the track ball device which is used to move the graphic cursor on the screen. It also contains buttons which are used to select a particular item on…
What is a Mouse ? MOUSE :- Mouse is Small hand-hold device Input device which is generally used for drawing purpose. It’s a Pointing device. It contains two or three buttons Left button is used to point out or select any item by clicking. Right to generate context menu. When user moves mouse across flat…
What is a Keyboard ? STANDARD INPUT DEVICE: KEYBOARD Keyboard is most commonly used input device. It is similar like a type writer which is used to enter data in the computer. It contains sets of keys such as alphabets, number & special signs. There are two types of keyboard. o General purpose keyboard o…
What is an Input Device ? The Input devices are the devices which are used to enter the data in the computer system. Keyboard, mouse, scanner, microphone are the example of input devices. The word ‘Input’ means to ‘put in’. Input devices are those which are used to feed data or instructions into the computer. …
Block Diagram of Computer or Simple Model of Computer A simple computer system comprises the basic components like Input Devices, CPU(Central Processing Unit) and Output Devices as under: Input Devices:- The devices which are used to entered data in the computer systems are known as input devices. Keyboard, mouse, scanner, mike, light pen etc are…
Generations of Computer In Computer language, “Generation” is a set of Technology. It provides a frameworkfor the growth of the computer technology. There are totally Five Computer Generations till today. Discussed as following. First Generation:- Duration: 1942-1955 Technology: vacuum tube o Used as a calculating device. o Performed calculations in milliseconds. o To bulky in…
Classification of Computers on basis of Sizes The computers are classified in four types on the based on data processing. Micro computer Mini computer Mainframe computer Super computer 1 . Micro Computer: Micro computers are the computers with having a microprocessor chip as it central processing unit. Originated in late 1970s. First micro computer was…
Classification of Computer By Data Processed The computers are divided mainly three types on the based on data processed: Analog computers Digital computers Hybrid computers 1 . Analog computers: In Analog Computers, data is represented as continuously varying voltage and operate essentially by measuring rather counting. As the data is continuously variable, the results obtained…
The Data Processing Cycle of Computer The computer Data Processing is any process that a computer program does to enter data & summarise, analyse or convert data into useable information. The process may be automated & run on a computer. It involves recording, analysing, storing, summarising & storing data. Because data are most useful when…