• comp.sys.3b1 (newsgroup)
• comp.sys.acorn (category)
• comp.sys.alliant (newsgroup)
• comp.sys.amiga (category)
• comp.sys.amstrad.8bit (newsgroup)
• comp.sys.apollo (newsgroup)
• comp.sys.apple2 (category)
• comp.sys.arm (newsgroup)
• comp.sys.atari (category)
• comp.sys.att (newsgroup)
• comp.sys.be (category)
• comp.sys.cbm (newsgroup)
• comp.sys.cdc (newsgroup)
• comp.sys.concurrent (newsgroup)
• comp.sys.convex (newsgroup)
• comp.sys.dec (category)
• comp.sys.encore (newsgroup)
• comp.sys.handhelds (newsgroup)
• comp.sys.harris (newsgroup)
• comp.sys.hp (category)
• comp.sys.hp48 (newsgroup)
• comp.sys.ibm (category)
• comp.sys.intel (category)
• comp.sys.intergraph (newsgroup)
• comp.sys.isis (newsgroup)
• comp.sys.laptops (newsgroup)
• comp.sys.m6809 (newsgroup)
• comp.sys.m68k (newsgroup)
• comp.sys.m88k (newsgroup)
• comp.sys.mac (category)
• comp.sys.mentor (newsgroup)
• comp.sys.mips (newsgroup)
• comp.sys.misc (newsgroup)
• comp.sys.msx (newsgroup)
• comp.sys.ncr (newsgroup)
• comp.sys.net-computer (category)
• comp.sys.newton (category)
• comp.sys.next (category)
• comp.sys.northstar (newsgroup)
• comp.sys.nsc.32k (newsgroup)
• comp.sys.oric (newsgroup)
• comp.sys.palmtops (newsgroup)
• comp.sys.pen (newsgroup)
• comp.sys.powerpc (category)
• comp.sys.prime (newsgroup)
• comp.sys.proteon (newsgroup)
• comp.sys.psion (category)
• comp.sys.pyramid (newsgroup)
• comp.sys.ridge (newsgroup)
• comp.sys.sequent (newsgroup)
• comp.sys.sgi (category)
• comp.sys.sinclair (newsgroup)
• comp.sys.stratus (newsgroup)
• comp.sys.sun (category)
• comp.sys.super (newsgroup)
• comp.sys.tahoe (newsgroup)
• comp.sys.tandem (newsgroup)
• comp.sys.tandy (newsgroup)
• comp.sys.ti (category)
• comp.sys.transputer (newsgroup)
• comp.sys.unisys (newsgroup)
• comp.sys.xerox (newsgroup)
• comp.sys.zenith (category)