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AirPort Express is a networking device to wirelessly deliver music from a Mac or Windows machine to a connected sound system using AirTunes technology. It also serves as a WLAN access point, can be used as a (USB) print server and can be connected directly to a DSL or Cable modem or an existing LAN.


Seattle Wireless has some info on the underlying hardware here: FCC’s photos of the motherboard (PDF format):

The main chip on the motherboard, from Broadcom, contains a MIPS CPU, wireless and ethernet controllers, and more.

Photos of the motherboard show, near the center of the board, three bare contacts which might or might not implement a serial console device for the underlying operating system, rumored to be Wind River’s VxWorks (a tiny and somewhat unixy embedded OS).