Copied from: http://www.ghostscript.com/doc/8.54/Hershey.htm
USE RESTRICTION: This distribution of the Hershey Fonts may be used by anyone for any purpose, commercial or otherwise, providing that: 1. The following acknowledgements must be distributed with the font data: - The Hershey Fonts were originally created by Dr. A. V. Hershey while working at the U. S. National Bureau of Standards. - The format of the Font data in this distribution was originally created by James Hurt Cognition, Inc. 900 Technology Park Drive Billerica, MA 01821 (mit-eddie!ci-dandelion!hurt) 2. The font data in this distribution may be converted into any other format *EXCEPT* the format distributed by the U.S. NTIS (which organization holds the rights to the distribution and use of the font data in that particular format). Not that anybody would really *want* to use their format... each point is described in eight bytes as "xxx yyy:", where xxx and yyy are the coordinate values as ASCII numbers.