The term also tends to be applied to devices that are hooked up externally, typically through some form of computer bus like USB. Typical examples include joysticks, printers and scanners. Devices such as monitors and disk drives are not considered peripherals when they are not truly optional.

Some people do not consider internal devices such as video capture cards to be peripherals because they are added inside the computer case; for them, the term peripherals is reserved exclusively for devices that are hooked up externally to the computer. It is debatable however whether PCMCIA cards qualify as peripherals under this restrictive definition, because some of them go fully inside the laptop, while some, like WiFi cards, have external appendages.

A computer peripheral is something like the printer that is not part of the central processing unit, the CPU, or more clearly the tower that holds it, but still attached as part of the computer. Zip drives, printers, speakers, etc.

RE:
What does the term Peripheral mean?
What does the term "Peripheral" mean in relation to computers

NOTE: I know what "Peripheral" means in relation to vision but I need to know in relation to COMPUTERS

as in perripheral that you know the meaning the surrounding stuff ie monitor keyboard mouse network cable printer

whatever you connect to