RTFM


RTFM is an initialism for the expression "read the fucking manual" – typically used to reply to a question that could have been easily answered from the product manual or documentation.
In expurgated texts, substitutions such as "read the frickn' manual", "read the factory manual", "read the field manual", "read the flaming manual", "read the fine manual", "read the friendly manual", "read the manual" or similar variants are used..

Possible origins

The initialism appeared in print in 1979 on the table of contents page of the LINPACK User's Guide in the form "R.T.F.M." – Anonymous, suggesting that it was already well established. Cleve Moler has since revealed that a visit to Argonne National Laboratory by Tektronix software manager Ned Thanhouser during the development of MATLAB led to the anonymous quote.
John Bear's 1983 book Computer Wimp! 166 Things I Wish I Had Known Before I Bought My First Computer! discusses the author hearing employees of a computer store mention RYFM.

List of similar initialisms