Every system mentioned in the FAQABOSS uses SPARC processors. SPARC is an acronym for scalable processor architecture. SPARC International owns the SPARC standards and SPARC trademark. Sun and other companies--including Fujitsu and Ross (now BridgePoint)--have designed their own implementations based on various version of the SPARC specification. Those implementations may then be manufactured by yet other companies; Texas Instruments, for example, has long been Sun's principle CPU fabricator.
Older Sun systems--members of the Sun 1, Sun 2, and Sun 3 product lines--use Motorola's 68000 series of processors. By the time the '040 was available, Sun had committed itself to SPARC and had released the first systems built around it.