SPARC
From Computer History Wiki
SPARC is Sun Microsystem's 32-bit RISC processor, not to be confused with its more modern 64-bit descendant, UltraSPARC. It was manufactured by several companies including Sun, Fujitsu, TI, etc.
It was used in a variety of Sun systems.
Sun-4 machines
The Sun-4s were SPARC-based computers using the Sun-3's general VMEbus approach.