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#TodayILearned that #Unix #stderr was created because early troff sent both document output and errors to the typesetting machine, wasting consumables! en.wikipedia.org/wiki/CAT_(pho…

Computer Assisted Typesetter, a phototypesetter developed by Graphic Systems in 1972

Contributors to Wikimedia projects (Wikimedia Foundation, Inc.)
#unix #todayilearned #stderr
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