I/O devices or computer peripherals provide the path for
communication between the computer system and the real
world. Three main types:
Mass Storage Devices (Hard disk, magnetic tape, CD-ROM, etc.)
Human Interface (Keyboard, mouse, joystick, CRT, printer,
Control/Monitor devices (Phototransistors, sensors,
switches, motors, relays, etc.)
, that can affect the
world around them when supplied with a voltage or current.
, that are
stimulated by temperature, pressure, light, motion, etc. and
convert this to voltage or current read by the computer.
The interface circuitry converts the voltage or current to binary
data, or vice versa.