Peripherals Devices in Computer Organization (original) (raw)

Last Updated : 11 Jul, 2025

A peripheral device is any external device connected to a computer that adds functionality but is not part of the core computer system. These devices typically handle input, output, or both, and are also known as input-output (I/O) devices. While not essential for a computer to perform its basic operations, peripherals enhance the user's experience by expanding the system’s capabilities. Common examples include keyboards, mice, printers, and external drives. Although the term is sometimes used loosely, it generally refers to devices located outside the computer case.

**Classification of Peripheral Devices

It is generally classified into four basic categories which are given below:

1. Input Devices:

An input device is defined as a device that converts incoming data and instructions into a pattern of electrical signals in binary code that are comprehensible to a digital computer.

**2. Output Devices:

An output device is generally the reverse of the input process and generally translates the digitized signals into a form intelligible to the user. The output device is also performed for sending data from one computer system to another. For some time punched card and paper tape readers were extensively used for input, but these have now been replaced by more efficient devices. Example:

3. Storage Devices:

Storage devices are used to store data in the system which is required for performing any operation in the system. The storage device is one of the most required devices and also provides better compatibility. Example:

**4. Communication Devices:

Communication devices are hardware devices that enables data exchange between computer systems or networks. These include:

Importance of Peripheral Devices

Peripheral devices are important for enhancing functionality of a computer. Here's why peripheral devices are so important:

Peripheral Devices Connecting Options

Peripheral devices can connect to a computer through various methods. Each offers different speeds, ranges, and compatibility. Common connecting options include: