Linked by Thom Holwerda on Tue 5th Sep 2006 19:43 UTC, submitted by MatzeLoCal
SGI and IRIX German technology website reports that SGI will completely abandon its MIPS processor architecture, including its operating system Irix, in favour of Linux-powered Itanium workstations. SGI used MIPS and Irix in its products for almost 20 years, and with this switch to Intel, yet another major (historically speaking, that is) company abandons its architecture for the more common Intel one.
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it is much more involved than that...

Solaris 1 is based on SunOS 4.1

SunOS 4.0 has influences from 4.3BSD (Tahoe)
SunOS 3.2 has influences from UNIX System VR3

therefore Solaris 1 has roots on 4.3BSD and is not based on UNIX System VR4, however as you can see Solaris 2.0 got influenced by UNIX System VR4.

it is not a trivial story...

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