Generally speaking, it's anythign that is not attached to the computer itself normally (like a hard drive, CPU etc.) and must interface with the computer another way such as through USB cables, speaker cables, bluetooth connections or any other kind of cable/wireless connection. Examples would be keyboards, speakers, bluetooth speakers, audio interfaces or external sound cards.
the speakers, mouse,printers,scarner,sound card, joy stick e.t.c
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Peripheral devise are the computer devices that are connected to the computer externally such as printer, scanner, keyboard, mouse, tape device, microphone and external modem. They can be internal such as CD-ROM or internal modem and external as the scanner, printer and Zip drive. Peripheral devices can be classified according to their functions.InputInput devices are the type of the computer devices that are used to provide the control signals to the computer. Keyboard and the Mouse are the examples of the input devices.OutputOutput devices are the devices that are used to display the results. Printer, scanner, speaker and the monitor are the examples of the output devices.StorageA storage device is a device that is used to store the information such as hard disk drive, flash drive, floppy disk and the tape drive.
A USB drive is a device that stores data and could be considered either an output or input device, though not in the sense of a monitor or speakers being an output device or a keyboard and mouse an input device. The data it contains cannot be directly accessable by the human senses in those same terms.
...The door? The refrigerator/freezer (though it requires a manual interface, in which you take the food out of the freezer and put it in the microwave by hand). Also, the buttons on a microwave might be considered an input device. There is no microwave input device in terms of home computers (with the possible exception of a hack that allowed you to control it via USB or something, but I've never heard of that being done). A cell phone or Blue Tooth device might be considered a "microwave device," or maybe a 3G or 4G device such as an adapter or hub. That frequency range of radio waves is considered microwave energy.
a device that can do work
Voltmeter is a device to measure EMF and potential difference in terms of volts Thermometer is a device to measure the temperature in terms of K(kelvin),C(Celsius) F(Fahrenheit)
PCI stands for Peripheral Component Interconnect, it is a type of architecture connectors used by different components.
if you mean in terms of energy then it refers to a device that transfers more useful energy than it wastes if you mean in terms of energy then it refers to a device that transfers more useful energy than it wastes
The central nervous system is responsible for coordinating all the information that is received from the body, whereas the peripheral nervous system connects the central system to the organs and limbs, relaying communication to and fro.
The advantage of programmable logic device is in terms of money. This device is cheaper rather than using microcontrollers that has to be certified before someone can use it.
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Only if it contains an equality sign otherwise it is considered to be an expression