These are generated bitmap versions of the Computer Modern fonts, at resolutions and using Metafont settings defined long ago. (The resolutions available are 120 and 240dpi, and 300dpi for both write-black and write-white printer engines.)
Since most modern distributions will generate any PK font needed, on the fly at output time, the present distribution is of little more than academic interest.
The author is Donald E. Knuth.
License: knuth Catalogued: 2015-08-03