Introduction to Number System The computer can understand binary number and when we type some letter or words the computer translates them in number. A computer can understand positional number system where there are only a few symbols called digits and these symbols represent different values depending on the position they occupy in the number. Each digit in a number can be represented by using Digit Position of digit in number Base of number system where base is defined as total number of digits Here are some number systems are as follows: Decimal number system Binary number system Octal number system Hexadecimal number system Decimal number system This number system is used in day to day life and consists of ten digits from 0 to 9 and use base 10. These digits are used to represent any numeric value it is mostly used in number system....

## Input – Output Devices with its types

Introduction to Input-Output Devices Input-output devices are used to communication between processing system. Inputs are the signals or data received by the system and outputs are the signals or data sent from it. It is also known as computer peripheral because they contain CPU and memory of computer system. Before a computer can process your data, you need some method to input the data into the machine. The device use to input data that takes place in form of text, sound and so on and after the computer has processed your data, you often need to produce output of the results. This output could be a display on the computer screen, hard copy on printed pages, or even the audio playback of music you composed on the computer. Here are number of different input-output devices. Input Devices: Graphics Tablets Keyboard Trackballs Bar code reader Joystick MIDI keyboard Mouse (pointing device) Scanner Touch pads Pen Input Microphone Cameras Video Capture Hardware Digital camera Game pad...