Processor-
(CPU) is the logic circuitry that responds to and processes the basic instructions that drive a computer.
RAM-
This is read and write memory. System and application software use RAM to store information
Graphics card-
is responsible for rendering an image to your monitor, it does this by converting data into a signal your monitor can understand.
Scanner-
When a document is scanned, it is converted into a digital format. Scanners work in conjunction with computer software programs, which import data from the scanner.
Digital camera-
is a camera that captures photographs in digital memory.