SCO UnixWare/7.1.0 reported by Allan Clark <allanc@sco.com> for 0.9.8
Some other reported cpu-vendor-os strings:
hppa1.1-hp-hpux10.20
mips-sgi-irix6.2
sparc-sun-solaris5.4
sparc-sun-sunos4.1.2
i386-pc-sysv4.2 (USL Unixware v1.1.2)