The Programmer's Workbench (PWB/UNIX) was an early, now discontinued, version of the Unix operating system that had been created in the Bell Labs Computer
The PWB shell (also known as the Mashey shell) was a Unix shell. The PWB shell was a modified (and generally constrained to be upward-compatible) version
Psychological well-being Programmer's Workbench, an early UNIX from Bell Labs, see PWB/UNIX a Text-based user interface, Integrated development environment
(such as PWB/UNIX and MERT) whose code-base had diverged from the primary CSRC version. However, that term was little-used until Version 8 Unix, but has
was the basis of the first ever commercially sold Unix version, INTERACTIVE's IS/1. Bell's own PWB/UNIX 1.0 was also based on V6, where earlier (unreleased)