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    This Operating System is a version of Unix. It is free and downloadable It runs on PCs with a 386 or faster processor. The networking ability of the Operating System is supposedly better than that of Linux.

Bounce buffering

which gets around a limitation in the PC's ISA architecture that limits direct memory access to the first 16 megabytes

A merged virtual memory and file system buffer cache

which continuously tunes the amount of memory used for programs and the disk cache

It offers compatibility modules enable programs for other operating systems to run on FreeBSD, including programs for Linux, SCO, NetBSD, and BSDI

The dynamically loadable kernel modules
which allows new file system types, networking protocols or binary emulators to be added to the kernel at runtime without having to generate a new kernel image and shared libraries reduce the size of programs, saving disk space and memory

FreeBSD uses an advanced shared library scheme
which offers many of the advantages of ELF, and the current version offers ELF compatibility for both Linux and native FreeBSD programs

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