Life with Unix says: Writer of the Writer’s Workbench (diction, style, etc.), be, and dc. Wrote eqn with bwk.

A Research Unix Reader says: Lorinda L. Cherry collaborated with Morris on dc-bc and typo. Always fascinated by text processing, Lorinda initiated eqn and invented parts, an approximate parser that was exploited in the celebrated Writer's Workbench®, ww6(v8).