The Free On-line Dictionary of Computing (30 December 2018):

FreeBSD

    A free operating system based on the BSD
   4.4-lite release from Computer Systems Research Group at
   the University of California at Berkeley.

   FreeBSD requires an ISA, EISA, VESA, or PCI based
   computer with an Intel 80386SX to Pentium CPU (or
   compatible AMD or Cyrix CPU) with 4 megabytes of RAM and
   60MB of disk space.

   Some of FreeBSD's features are: preemptive multitasking with
   dynamic priority adjustment to ensure smooth and fair sharing
   of the computer between applications and users.  Multiuser
   access - peripherals such as printers and tape drives can be
   shared between all users.  Complete TCP/IP networking
   including SLIP, PPP, NFS and NIS.  Memory
   protection, demand-paged virtual memory with a merged
   VM/buffer cache design.  FreeBSD was designed as a 32 bit
   operating system.  X Window System (X11R6) provides a
   graphical user interface.  Binary compatibility with many
   programs built for SCO, BSDI, NetBSD, 386BSD, and
   Linux.  Hundreds of ready-to-run applications in the FreeBSD
   ports collection.  FreeBSD is source code compatible with
   most popular commercial Unix systems and thus most
   applications require few, if any, changes to compile.  Shared
   libraries.  A full compliment of C, C++, Fortran and
   Perl development tools and many other languages.  Source
   code for the entire system is available.  Extensive on-line
   documentation.

   (http://freebsd.org/).

   (ftp://ftp.freebsd.org/pub/FreeBSD) or try your nearest
   mirror site listed at the home site or buy the CD-ROM from
   Walnut Creek.

   (1998-11-24)