NetBSD/pmax evolved from the 4.4BSD pmax port. 4.4bsd/pmax was in large part the work of Ralph Campbell and Rick Macklem (firstname.lastname@example.org) starting in October 1993. Adam Glass took the pmax portions of 4.4bsd-Lite and incorporated it it into the NetBSD tree in May 1994. Jonathan Stone, Ted Lemon and many others have contributed to it since then.
There was no pmax port in NetBSD 1.0. Since then, many of the idiosyncracies of the 4.4bsd/pmax kernel have been replaced with the standard NetBSD equivalents. The first official release was the with NetBSD 1.1 in November 1995, though there had been many snapshots available before.
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