386BSD		an Intel 386, running 386BSD
VMS_POSIX	a vax? running VMS/POSIX
aix370		an IBM 370, running aix
aixESA		an IBM ESA, running aix
alliant		an Alliant FX series
alliant_fx2800	an Alliant FX2800 (i860 based)
alliant_fx80	an Alliant FX80 (mc68000 based)
alpha		a DEC Alpha running OSF/1
amdahl		an Amdahl running uts 2.1
amiga		an amiga running amix 2.02
apollo		an Apollo running DomainOS
att3b15		an AT&T 3b15
att3b2		an AT&T 3b2
att3b20		an AT&T 3b20
att3b5		an AT&T 3b5
balance		a Sequent Balance (32000 based)
bsd386		an Intel 386, running BSDI's bsd386
c90		a Cray C90 running Unicos
cm2		a Thinking Machines Corperation CM-2
cm5		a Thinking Machines Corperation CM-5
coh386		a 386 running Coherent 4.0
coherent	an Unknown machine running Coherent
convex		a Convex
cray		a Cray running Unicos
decmips
decstation	a DecStation XXXX
eta10		an ETA 10 running SVR3
gould_np1	a Gould NP1
gp1000		a BBN GP1000 (Butterfly 1) running MACH
hk68		a Heurikon HK68 running Uniplus+ 5.0
hp		an HP, running hpux
hp300		an HP 9000, series 300, running mtXinu
hp800		an HP 9000, series 800, running mtXinu
hp9000s300	an HP 9000, series 300, running hpux
hp9000s500	an HP 9000, series 500, running hpux
hp9000s700	an HP 9000, series 700, running hpux
hp9000s800	an HP 9000, series 800, running hpux
i386		an Intel 386, generic
i386_emx	an Intel 386, running emx [unix emulation under OS/2]
i386_linux	an Intel 386, running Linux
i386_mach	an Intel 386, running mach
i860		an Intel i860 Hypercube
intel386	an Intel 386, running INTEL's SVR3
sgi4k		a Silicon Graphics R4K based machine
sgi8k		a Silicon Graphics R8K based machine
isc386		an Intel 386, running ISC
ksr1		a Kendall Square KSR1
m68k		an mc68000 CPU machine
m88k		an mc88000 CPU machine
mac2		an Apple Computer Macintosh II, running AUX
masscomp	a Concurrent (Masscomp), running RTU
minix		a mac or an amiga running minix
minix386	an i386 running minix
mips		another mips CPU
multimax	an Encore Computer Corp. Multimax (32000 based)
nd500		a Norsk Data ND 500/5000 running Ndix
news		a Sony NEWS 800 or 1700 workstation
news_mips	a NeWS machine with mips CPU
next		a NeXT computer
ns32000		an NS32000 CPU machine
opus
paragon		an Intel paragon running OSF1/Mach
pfa50		a PFU/Fujitsu A-xx computer
ps2		an IBM PS/2, running aix
ptx		a Sequent Symmetry running DYNIX/ptx (386/486 based)
pyramid		a Pyramid Technology computer (of any flavor)
rs6000		an IBM RS6000, running aix 
rt		an IBM PC/RT, running BSD (AOS 4.3) or mach
rtpc		an IBM PC/RT, running aix
sco386		an Intel 386, running SCO
solaris2	a Sun Workstation running SVR4 Solaris 
stellar		a stellar running stellix
sun		a Sun workstation of none of the above types
sun2		a Sun Microsystems series 2 workstation (68010 based)
sun3		a Sun Microsystems series 3 workstation (68020 based)
sun386i		a Sun Microsystems 386i workstation (386 based)
sun4		a Sun Microsystems series 4 workstation (SPARC based)
symmetry	a Sequent Symmetry running DYNIX 3 (386/486 based)
sysV68
sysV88		a Motorola MPC running System V/88 R32V2 (SVR3/88100 based)
tahoe		a tahoe running 4BSD
tc2000		a BBN TC2000 (Butterfly 2) running MACH
tek4300		a Tektronix 4300 running UTek (BSD 4.2 / 68020 based)
tekXD88		a Tektronix XD88/10 running UTekV 3.2e (SVR3/88100 based)
titan		an Stardent Titan
unixpc		an UNIX/PC running SVR1 att7300 aka att3b1
unknown		a machine type could not be determined
vax		a Digital Equipment Corp. Vax (of any flavor)
vistra800	a Stardent Vistra 800 running SVR4