Trailing-Edge - PDP-10 Archives - BB-PBQUC-BM_1990 - help/ctrlv.hlp
There are no other files named ctrlv.hlp in the archive.

Allows special characters (any character other than  an  alphanumeric,
or  the  special  characters  - _ . or  $)  in file specifications and
directory names.  Type CTRL/V before typing the special character  any
time you type the file specification.

Special characters are not accepted by the following system programs:
                  ALGOL    COBOL    CREF    FILCOM    ISAM
                  LIBARY   LINK     MAKLIB  RERUN