Linked by David Adams on Thu 3rd Mar 2011 20:23 UTC, submitted by Amy Bennett
Hardware, Embedded Systems IDC's newest survey of server vendors shows boxes running every kind of operating system -- except Unix -- sold more during the last three months of 2010. Sales of Linux servers rose 29 percent; Windows rose 16.8 percent, but most surprisingly, sales of mainframes shot up 69 percent " the highest growth rate IDC ever found on mainframes.
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Mac OSX comes from NextStep code which in turn comes from BSD code which in turn comes from Unix code.

GNU and GNU/Linux code spring up out of nowhere (no predecessor code for either of them). They were both written from scratch. GNU source code was originally written from scratch using editors on Unix systems, whereas Linux source code was written from scratch using the editor on a Minix system. Both are now supported on Linux systems.

Actually, OS X and the current BSDs do not contain any UNIX code.

All of them can be traced to the short-lived 386BSD. FreeBSD and NetBSD were directly based to 386BSD, OpenBSD is a NetBSD fork, DragonflyBSD is a FreeBSD fork and PC-BSD is to FreeBSD what Ubuntu is to Debian (sans the stupid flame wars). XNU's (OS X's kernel) BSD parts are also based on FreeBSD.

386BSD was a x86 port of the Net/2 release which was essentially a rewrite of all 4.3BSD code that was under AT&T's copyright. So, while Net/2 and 4.3BSD were pretty much the same thing, there was no UNIX code in the former.

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