Best Edition

The "best edition" is the edition published in the United States at any time before the date of deposit in the Copyright Office that the Library of Congress determines to be most suitable for its purposes.

Currently, the Library accepts in descending order of preference:

1. Film
   1. Preprint material with special arrangement
   2. 35mm positive prints
   3. 16mm positive prints
2. Videotape formats
   1. 1-inch open reel tape
   2. Betacam SP
   3. D-2
   4. Betacam
   5. Videodisk
   6. 3/4-inch cassette
   7. 1/2-inch VHS cassette