The Linux User Group HOWTO is intended to serve as a guide to founding, maintaining, and growing a GNU/Linux user group.
GNU/Linux is a freely-distributable implementation of Unix for personal computers, servers, workstations, PDAs, and embedded systems. It was developed on the i386 and now supports a huge range of processors from tiny to colossal:
Advanced RISC Machines, Ltd. ARM family (StrongARM SA-1110, XScale, ARM6, ARM7, ARM2, ARM250, ARM3i, ARM610, ARM710, ARM7TDMI, ARM720T, and ARM920T, including Sigma Designs DVD systems using ARM cores)
Intel IA32 family: i386, i486, Pentium, Pentium Pro, Pentium II, Pentium III, Celeron, Xeon, and Pentium IV processors, as well as IA32 clones from AMD (386DX/DXL/SL/SLC/SX, 486DX/DX2/DX4/SL/SLC/SLC2/SLC3/SX/SX2, Elan, K5, K6/K6-II/K6-III), Cyrix (386DX/DXL/SL/SLC/SX, 486DLC/DLC2/DX/DX2/DX4/SL/SLC/SLC2/SLC3/SX/SX2, Cyrix III), IDT (Winchip, Winchip 2, Winchip 2A/3), IBM (486DX/DX2/DX4/SL/SLC/SLC2/SLC3/SX/SX2), NexGen (Nx586), Transmeta (Crusoe), TI (486DLC/DLC2), UMC (486SX-S, U5D/U5S), VIA (C3 Ezra "CentaurHauls", C3-2 "Nehemiah"), and others.
Note that some items listed were probably one-time forks, little or not at all maintained since creation. On some of the rarer architectures, NetBSD may be more practical. (Soon, the Debian GNU/NetBSD and Debian GNU/kFreeBSD ports should be solid enough to serve as a compromise option, furnishing GNU/Linux userspace code on the highly portable NetBSD kernel and the high performance / high stability FreeBSD kernel, respectively.)