An Etymological Dictionary of Astronomy and Astrophysics

1. The use of documentary evidence.
   

2. A furnishing with documents, as to substantiate a claim or the data in a book or article.
   

3. Computers: Manuals, listings, diagrams, and other hard- or soft-copy written and graphic materials that describe the use, operation, maintenance, or design of software or hardware (Dictionary.com).

See also: → document; → -tion.