History of OSs? - test-drb@ccmp.vtda.org

17 Mar 1998

<Does anyone know of a more-or-less comprehensive history of Operating
<Systems online? I'd like to come up to speed on the OSs that are being

Unknown try alta vista.

<I'd be very interested to see a geneology tree--I've noticed some Unix
<genes in DOS (few) and I'm told it was based in part on things CP/M was
<doing at the time.

The dos geneology is roughly...

DEC PDP-8 OS/8 (pip, stat, dir)-->                     RT-11/RSTS/RSX11-->
                            CPM-80-->
                              CPM86-->
                                 dos-1.0-->

The VAX OS line up VMS is off the RSX11 part fo the PDP-11 tree.

DOS was a translation of 8080 CPM-80 to 8086 by seattle computer. Unix 
has been an influence but largely not that great. 

UNIX has it's own tree and there are to say the least many flavors some 
of which even resemble each other.
Allison