format (v.) Look up format at Dictionary.com
used chiefly of computers, 1964, from format (n.). Related: Formatted; formatting.
format (n.) Look up format at Dictionary.com
1840, via French format (18c.), ultimately from Modern Latin liber formatus "a book formed" (in such and such a way), referring to shape, size; from past participle of formare "to form" (see form (v.)).