Darwin/Mac OS X: The Fifth BSD

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In dit artikel worden de 5 BSDs besproken‚ BSDi‚ OpenBSD‚ NetBSD‚ FreeBSD en Darwin / Mac OS X.

[quote]Much of the early work on the Berkeley Software Distribution (BSD) in the 1970’s was based on code originally from AT&T. In fact‚ all BSD source distributions up through 4.3BSD-Tahoe required the user to also purchase a source license from AT&T because a significant portion of the BSD source came directly from AT&T UNIX. This additional cost became prohibitively expensive for vendors wanting to use the BSD-derived‚ TCP/IP networking code for the PC market. These vendors requested that Berkeley break out this “BSD-only” code and provide it as a separate product. This “wholly-BSD” product was released as Network Release 1 in 1989‚ and it became an instant success. Work began soon thereafter to rewrite the AT&T portions of the rest of the 4.3BSD code to produce a feature-complete‚ BSD operating system without the costly licensing constraints imposed by AT&T.
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