How to Build Your Own PC - Save A Buck And Learn A Lot  9  Chapter 2: Component Overview

Modem 1 Keyboard and Mouse

Network Interface Card (NIC) and other PCI controller cards giving your PC added capability. If you decide to connect your home or business computers together to form your own mini-network, you’ll need to install network interface cards on each PC you plan to connect together (unless your mainboards include built-in LAN connections).

Adding a controller card to your PC is easy. These cards are designed to plug into existing slots in your PC mainboard. These slots are called expansion slots. Today, PCI slots are the most common. The older ISA slots are now outdated.

Modem 1 Keyboard and Mouse