BSD

BSD (Berkeley Software Distribution), is derived from the UNIX operating system, and has been under development in one form or another since 1977. It is significant not only as a progenitor of UNIX-like operating systems in general, but also of the BSD Software license. This license has been used to distribute all manner of free, Open Source Software to this day.

BSD itself has long since forked into various projects with different individual goals, but the same general philosophy. Each distribution aims to make a stable and robust free operating system that is useful to the largest possible user demographic.

BSD Operating Systems

FreeBSD

  • FreeBSD
  • FreeBSD is the most widely used variant of the BSD operating system today. It is free to download and install, and is considered by many to be the most robust server operating system available.

    The FreeBSD project aims to develop a full featured operating system that is both portable and secure, while supporting a wide user base - from desktop users to the busiest servers in the world.

PC-BSD®

  • PC-BSD®
  • PC-BSD® is a desktop operating system based on FreeBSD. Rather than having the user build their own environment from the base operating system, PC-BSD® aims to make the FreeBSD experience easy and achievable for the average "casual" computer user.

    From the installation of the system to its use thereafter, the goals of PC-BSD® are to never have a user run aground of viruses, driver issues, or anything that would impede ease-of-use and general reliability.

NetBSD

  • NetBSD
  • NetBSD is a Unix-like, BSD derivative. It is freely redistributable, and has a focus on portability. One of the main goals of the NetBSD project is that the operating system be able to run on as many processor architectures as possible, while remaining compliant with open API and protocol standards.

OpenBSD

  • OpenBSD
  • OpenBSD is another Unix-like BSD derivative. It shares many features common to other BSD distributions, but places additional emphasis on security, accurate documentation, and code correctness.

    The development team also goes to great lengths to ensure that the source code for the operating system remains as free as possible.

Dragonfly BSD

  • Dragonfly BSD
  • DragonFly BSD is a free Unix-like BSD derivative. Its primary focus is on extensive modification of the core BSD kernel to make it more compatible and efficient when working with multiple processor cores and clustered systems. It supports fewer processor architectures than other BSD flavors, in effort to produce the best possible implementation of SMP (Symmetric MultiProcessing, the use of many CPUs).