Special Event 2002: Apple introduces Xserve 

Apple introduced the Xserve on May 14, 2002 (released in June). Originally, it had one or two PowerPC G4 processors running at 1.0 GHz and supported up to 2 GB of PC-2100 memory on a 64-bit memory bus. Three FireWire 400 ports (one in front, two in rear), two USB 1.1 ports (rear), an RS-232 management interface (rear), and a single onboard Gigabit Ethernet port (rear) were provided for external connectivity. (wikepedia.org)