A computer mouse with the most common standard features which has two buttons and a scroll wheel and also act as a third button. In computing, a mouse is a pointing device that detects two-dimensional motion relative to a surface .this motion is typically translated into the motion of a pointer on a display, which allows for fine control of a graphical user interface.


A computer mouse enables its user to move a cursor smoothly and intuitively across a two-dimensional plane. It’s therefore an essential input device for selecting, dragging, hovering, and clicking. The mouse allows users to switch between applications, select options and buttons, and move around the screen with a great degree of accuracy and fluidity.

Fig-1: Logitech mouse.

Different types of mouse model and company name:
Company name Model Company name Model
A4-TECH Em-100-3 Mercury m-502
LOGITECH b-100 S tec s-201
Vision Vm-200 Perfect p-401

delux d-100 Havit h-201


Introduction: keyboard is the set of typewriter-like keys that enables you to enter data into a computer. Computer keyboards are similar to electric-typewriter keyboards but contain additional keys. The keys on computer keyboards are often classified as follows:
Alphanumeric keys – letters and numbers
 Aunctuation keys – comma, period, semicolon, and so on.

 Apecial keys or Modifier keys – function keys, control keys, arrow keys, Caps Lock key, and so on.
Function: The most widely used layout in the English language is called QWERTY, named after the sequence of the first six letters from the top left.
Other sets of keys common to almost all keyboards are entering and editing keys (eg, Enter, Delete, Insert), modifier keys (eg, Control, Shift), navigation keys (eg, arrows for up, down, left, right) and lock keys (eg, Caps Lock). Additional keys are very operating system specific (such as the Windows and Apple keys).


Different types of keyboard model and company name:
Company name Model Company name Model
A4-TECH A-4500 Mercury Mercury 4002
LOGITECH k-120 S tec s-444
Vision v-2000 Perfect p-208
delux l-200 Havit h-203


Introduction: A printer is any device that prints text or illustrations on paper. There are many different types of printers.
1. Dot-matrix: Creates characters by striking pins against an ink ribbon. Each pin makes a dot, and combinations of dots form characters and illustrations.
2. Ink-jet: Sprays ink at a sheet of paper. Ink-jet printers produce high-quality text and graphics.
3. Laser: Uses the same technology as copy machines. Laser printers produce very high quality text and graphics.
4. Thermal printer: An inexpensive printer that works by pushing heated pins against heat-sensitive paper. Thermal printers are widely used in calculators and fax machines.
Function: Dot matrix printers are an example of printers that impact the paper a line at a time. Non-impact printers create an effect on paper without an impact. An example is the inkjet printer, which sprays ink from a cartridge while the paper rolls by it. Laser printers use lasers to attract ink to paper.

Different types of printer model and company name:
Company name Model Company name Model

Hp A-4500 Samsung Pi-4002
Canon k-1200 Canon Pxima-1111
Vision v-2000 Hp Inkjet-1111
delux l-2000 toshiba y-12545
Canon inkjet printer