Digital BW, The Print

Some months ago I did some testing printing black and white images.  I made some notes on the backs of the photos.  But I don't remember what software I used.  (My advanced age is most likely a factor).   Anyway, one photo is labeled "silver gel," another "photo enhance gray," and finally "collodian."  Any ideas as to what software I was using  for the prints?  I imagine Photoshop played a part.  Many thanks in advance from Norm.