pktype verifies a PK-format bitmap font. pktogf converts a PK-format bitmap font to GF format. These programs were originally written by Tomas Rokicki as part of his Stanford Ph.D. work, and have always been distributed alongside the other programs coming from the Stanford TeX project, though they are not maintained by Donald Knuth. The related program gftopk[.web], however, is maintained by DEK and is part of his "mfware" collection.