High Quality Content by WIKIPEDIA articles! Norton Commander (commonly shortened to "NC") was a prototypical orthodox file manager (OFM), written by John Socha and released by Peter Norton Computing (later acquired by the Symantec corporation). NC is a file manager which provides a text user interface on top of DOS. It was officially produced by Symantec between 1986 and 1998. The last DOS version of Norton Commander, 5.51, was released on July 1, 1998.