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odprevented the use ofodas a keyword can be found (sans citation) in en.wikipedia.org/wiki/Od_(Unix).ENDSWinstead ofHCTIWS- what was SRB thinking??!^is a secondary pipe character, whereas it doesn't work that way in either POSIX sh or bash. There's an argument to be made that the POSIX sh standard was more closely drawn from ksh, which was modeled off Bourne...echo hello ^ cat. In POSIX sh or bash it outputshello ^ cat; in real original Bourne it outputs justhello. (That test is how GNU autoconf distinguishes between original Bourne and POSIX-family shells like ash, dash, or bash).