A UnixworkstATion produced by {Sun Microsystems, Inc.} in the lATe 1980s[?], based on {SPARC} processors. The Sun-4 followed the Sun-3 WorkstATion. LATer SPARC-based workstATions were called "SPARCstATions". [Details? DATes? Was "Sun-4" a SPARCstATion?] (2001-03-11)