Input Devices: barcode reader, camera, card reader, keyboard, microphone, mouse, palm reader, scanner, and sensor. Output Devices: actuator, barcode writer, disk drive, fax machine, monitor, motor, printer, and speaker.
Peripheral devices are hardware items that can be attached to a computer e.g. mouse, monitor, keyboard, printers, modems etc.
A hardware device (such as a video monitor, disk drive, printer, or CD-ROM) used with a computer and under the computer's control. SCSI peripherals are controlled through a SCSI host bus adapter.