v7 man page for file

FILE(1) 						      General Commands Manual							   FILE(1)

NAME
       file - determine file type

SYNOPSIS
       file file ...

DESCRIPTION
       File performs a series of tests on each argument in an attempt to classify it.  If an argument appears to be ascii, file examines the first
       512 bytes and tries to guess its language.

BUGS
       It often makes mistakes.  In particular it often suggests that command files are C programs.

																	   FILE(1)