ARCS is a firmware bootloader (also known as a PROM console) used in most computers produced by SGI since the beginning of the 1990s.
Most of the computers which use the ARCS firmware are based on the MIPS line of microprocessors.
The SGI Visual Workstation series, which is based on the Intel Pentium III, also uses ARCS.
The Visual Workstation series is the only commercially produced x86-compatible system which used an ARCS firmware, rather than the traditional PC BIOS used in most Intel 386-lineage machines.
A list of product lines which use the ARCS console includes: This operating-system-related article is a stub.