--- On Thu, 9/16/10, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
  I wonder if it's a conincidence that the PERQ POS
 filesystem recovery
 tool is also called 'scavenger' and that the PERQ
 filesystem also stores
 all the pointers at least twice so it's posisble to recover
 from quite
 bad disk corruption. Not that any PERQ had a dmountable
 hard disk. 
The Perq was the result of a visit (sabbatical?) at Xerox PARC
by one of the principals of Three Rivers Computer, much like
the way Lilith originated from Wirth's experiences there.
I believe that the original code name of the Perq was the
"PascAlto", referring to its obvious heritage, but with the
intent to base the software on UCSD Pascal rather than BCPL.
Undoubtedly the Perq owes much to the Alto, as did every other
similar graphical workstation of that era.
--Bill