Computer devices

Today, apparently, the PC consists mostly of a computer case, monitor, keyboard, and mouse, as shown in Figure 3.1. However, as simple as it may seem, computer devices are categorized depending on their function and where they are located in the so-called computer system. So, depending on their function, computer devices are categorized as follows:

• Input devices: These devices create input for computer processing architecture
• Output devices: These devices create output from what has been processed by computer processing architecture
• Input/output devices: These devices are touch-enabled devices that act as an input and output device at the same time

The other categorization, based on the location of the devices, is as follows:

• Internal devices: These devices are located exclusively inside the computer's case. Power supply, motherboard, and accompanying components, hard drives, extension cards, and other internal hardware components are examples of internal devices.
• External devices: These devices are connected to the computer's case, and are essential devices of a computer system as a whole. A keyboard, monitor, mouse, speakers, earphones, webcam, microphone, and other external hardware components are examples of external devices.
• Peripheral devices: These devices are located near to the computer, and as such are not an essential part of the computer system as a whole. Printers, scanners, projectors, plotters, and other such devices are examples of peripheral devices.
• Network devices: These devices are connected to a computer over a network cable. Network printers, network scanners, network backup libraries, Network Attached Storage (NAS), Storage Area Network (SAN), and other network devices are examples of network devices: