is an electronic device that operates (works) under the control of programs stored in its memory unit.

refers to the physical parts of a computer and related devices.

it has a ball that can rotate using a finger or the palm to move the pointer.

is a piece of hardware that carries out the instructions of a computer program. It performs the basic arithmetical, logical, and input/output operations of a computer system.

elapses between start and end of the process or task

very fast and expensive

is the most common input device that is used to enter data for computer processing. It accepts letters, numbers, and commands from the user.

lets one select option from on-screen menus. It is used by moving it on a flat surface, pressing its two buttons, and scrolling the wheel that is located between the buttons.

an input device that converts the analog signal from the television camera into strings of binary digits that can be stored on a computer.

used to read a printed text and preparation of electricity bills, insurance premium, telephone bills.

is a digital video camera that enables users to create a movie to take still photographs electronically.

is any hardware component or unit used to display the result of the computer and transmits information to one or more people.

an output device used to produce text and graphics on a medium such as paper.

a flat-panel display that uses light-emitting diodes for backlighting. LED monitors are considered environment- friendly and use lesser power than LCD and CRT.

an output device that can take images generated by a computer and reproduce them on a large, flat (usually lightly colored) surface.

regulates the operation of the entire machine, it fetches and interprets instructions.

non-volatile magnetic storage devices capable of remembering vast amounts of data.

is very large in size and is an expensive computer capable of supporting hundreds or even thousands of users simultaneously.

also called a trackpad. It is a touch-sensitive pad that lets the user move the pointer by touching and dragging his or her finger on the pad.

scanners that look like a miniature printer with a flin-la cover protecting the glass platen. They are often built into multifunction printers.

portable scanners can be small enough to fit inside one's pocket.