.MT
Specify memorandum type and title . Controls format of formal memoranda and must be specified after other elements, such as .TL , .AF , .AU , .AS , and .AE . User-supplied title is prefixed to page number.
.TL
.AF
.AU
.AS
.AE
0
No type.
1
Memorandum for file (default).
2
Programmer's notes.
3
Engineer's notes.
4
Released paper.
5
External letter.
string is printed.