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Life with Unix says: Wrote find, cpio, expr. Added named variables to shell. Major contributor to PWB.
A Research Unix Reader says: Joe (Joseph F.) Maranzano of the USG and Dick (Richard C.) Haight of PWB became de-facto adjunct members of the research group. Haight contributed find, cpio, expr, and popen, all in v7. He also contributed the bs programming language which appeared in PWB/UNIX 2.0, UNIX System III Release 3.0, System V, and many licensed derivatives.