M routines have a name and consist of lines of code followed by an end-of-record which is a carriage return, formfeed (<CR><FF>) sequence. M separates the name of a routine from the body of the routine with an end-of-line which is a carriage-return, line-feed (<CR><LF>) sequence.

GT.M stores routine sources in RMS UNIX files and implicitly supplies the end-of-record and end-of-line character sequences.

In M, a routine has no particular impact on variable management and may include code that is invoked at different times and has no logical intersection.