Optical assembly containing laser and sensing components.

Optical drive using a laser to read or write media.

Semiconductor diode that emits laser light.

Physical-layer hardware for LAN communication.

Chip controlling local-area network communication.

Hardware providing local-area network connectivity.

Memory capacity equal to approximately 1,000 bytes or 1,024 bytes depending on convention.

Mechanical or electrical switch detecting a key press.

Electrical matrix used to detect keyboard keys.

Hardware converting key presses into coded signals.