AIX............. 3.2, 4.1 BSDI............ 2.0 Digital UNIX.... V3.2 FreeBSD......... 2.1 HPUX............ 9.04, 10.01 Linux........... 1.2.3, 2.0.0 Machten 68k..... 4.3 NCR.SVR4........ V3.0 QNX............. 4.22 SCO............. SVR3.2, Open Server 5.0 SGI.Irix........ 5.3 SINIX........... 5.42 Sequent PTX..... Solaris......... 2.3 (and greater) SunOS........... 4.1.3 OS/2............ 4.0 Windows/NT...... 3.5.1 on Intel, Alpha, PowerPC Windows/95...... any Macintosh....... (via MPW)