The Writer's Workbench (wwb) is a grammar checker created by Lorinda Cherry and Nina Macdonald of Bell Labs.
[3] wwb's utilities were capable of analysing text for parts of speech, and for word and sentence length, and of comparing the results to established norms.
[7] As of 1986, this had increased to around 35–40 utilities:[8] The wwb package was included with AT&T UNIX in the late 1970s and early 1980s and received wide distribution as a result.
[9] Various successors arose, based closely upon wwb, such as the commercial Grammatik packages for IBM PCs.
[11][3][10] The GNU operating system contains free software implementations of several wwb utilities, such as spell, style and diction.