Bus allowing additional hardware devices to be connected.

Hardware measuring rotational speed of a fan.

Circuit that suppresses unwanted electromagnetic interference.

Circuit board adding functionality to a computer.

Ethernet networking operating at 100 Mbps.

Material or enclosure blocking electromagnetic interference.

Physical interface for adding external or internal hardware.

Floppy-disk controller managing floppy drives.

Microcontroller managing low-level device functions.

Motherboard slot accepting an expansion card.