Airport Base Station Hardware: It can be hard to tell one model from another because Apple regularly improves the innards but not necessarily the box. Here's a table to help keep track:

Airport Cards: Before Apple started building wireless onto the motherboard, there were B, and later G, versions of the Airport card that could be added to your computer in order to give it wireless capabilities. The Snow (Dual Ethernet) version of the Airport Base Station contains a standard Airport (B) Card that can be salvaged and used in a