Oh, yes, I think it was Digital Unix. IIRC, we toyed with OSF/1, but there wasn't much call for it.
Technically OSF/1 was supposed to be the commercial BSD answer to System V, in practice only several niche vendors used it, plus Digital and NeXT (and through NeXT, Apple which continues the line to this day)
Other than the COLUMNS thing. That is burnt into my memory forever.