It is one of the most popular hand-held pointing device that detects motion to a surface. This motion is translated into the motion of a pointer on a display, which allows smooth control of the graphical user interface of a computer.

In general, it has two buttons: the left and right buttons and a wheel between them. The mouse movements can control the cursor's position on the screen, but they cannot be used to enter text.

It is the most common popular input device and a piece of computer hardware that is used to input data, text, characters, and other commands into a computer. There are some additional keys for performing additional functions on the keyboard, similar to the layout of a traditional typewriter.

It is an input device of a computer system that is used for reading standardized identifications and bar coded data (dim lines with alphanumeric values that differ in width and height). Bar coded data is used in labelling goods, numbering books, etc. It may be a handheld scanner or may be embedded in a stationary scanner.

The bar code reader scans a bar code image and converts it into an alphanumeric value, which is then sent to the computer that the reader is connected to.

The Hard Disk Drive is a magnetic disk used to store computer data. It uses magnetic storage to store and retrieve digital data using one or more rigid, rapidly rotating platters coated with magnetic material. Data is stored by magnetizing or demagnetizing the magnetic coating. A magnetic reader arm is used to read data from and write data to the disks. A typical modern HDD has a capacity in terabytes (TB).

This is a digital optical disc storage format. It is designed to supersede the DVD format, and capable of storing several hours of high-definition video, data, information, and other multimedia files. Blu Ray Disk has a shorter wavelength laser as compared to CD/DVD. This enables the writing arm to focus more tightly on the disk and hence pack in more data.

DVD stands for Digital Video Display. DVD Drive is optical devices that can store 15 times the data held by CDs. They are usually used to store rich multimedia files that need high storage capacity. DVDs also come in three varied only, recordable and rewritable.