strn - scanning threaded read news program
trn [options] [newsgroups]
Strn has been replaced by trn, version 4.0. (The last independent version of strn was version 0.9.2.) Trn is a threaded version of rn, which is a replacement for the readnews(1) program.
See the trn manual page.
trn(1)
Generally self-documenting, as they say.
See the trn manual page.