Debian Another Linux distribution. Red Hat Another Linux distribution. Caldera A commercial Linux vendor. A companys you can purchase support from. Before installing Linux, you need to verify that your hardware is supported.
Most modern hardware is supported, but it's good to check.
XFree86 The X Window System for Linux. A commercial X Window System vendor. Graphics A commercial X Window System vendor. A great place to start looking for FAQs, collections of frequently-asked questions. UNIX FAQ General UNIX frequently-asked questions list.