"The OpenBSD project produces a FREE, multi-platform
4.4BSD-based UNIX-like operating system. Our efforts place emphasis
on portability, standardization, correctness, security, and
cryptography. OpenBSD supports binary emulation of most programs
from SVR4 (Solaris), FreeBSD, Linux, BSDI, SunOS, and HPUX.
"The current release of OpenBSD is 2.5 which started shipping
May 19, 1999. The CDs (and Shirts) can be ordered... OpenBSD is
freely available from our FTP sites, and also available in an
inexpensive 2-CD set. The costs of producing the CD sets have
been underwritten by a grant from the USENIX Association."