DOCUMENTATION
documentation, support
(noun) documentary validation; “his documentation of the results was excellent”; “the strongest support for this view is the work of Jones”
documentation, certification, corroboration
(noun) confirmation that some fact or statement is true through the use of documentary evidence
Source: WordNet® 3.1
Noun
documentation (countable and uncountable, plural documentations) (very rare in the plural)
Something transposed from a thought to a document; the written account of an idea.
Documentary evidence and sources.
(computing, mechanical engineering) Documents that explain the operation of a particular machine or software program.
(programming) Comments that explain the usage of individual functions, libraries and blocks of code.
Source: Wiktionary