This document discusses Apple routers including the Airport Express, Airport Extreme, and Time Capsule. It notes that routers connect computers to the internet wirelessly and minimize wires. The Airport Express is the smallest and cheapest Apple router, allows wireless printing and stereo, and works with both Apple and Windows. The Airport Extreme is aimed at business users and offers guest networking and external hard drive connectivity. The Time Capsule combines a wireless hard drive with printing and backup capabilities.