Copied and zipped from original "HP DeskJet 550C Printer Drivers for Color DOS applications" driver disk. Disk says (it is for)
Harvard Graphics, V 3.0
Lotus 1-2-3, rel. 2.4
Lutus 1-2-3, rel. 3.1, 3.1+
WordPerfect, ver 5.1
Word, ver 5.5
WordStar, ver. 7.0B