HP 3000 Manuals

COBOL/HP-UX Language Reference for the Series 700 and 800

The NOT Operator (-) 

DB2 allows the operators (-)=, (-)> and (-)<.  To support these, they are
mapped to <>, <= and >=.  The character representation of the character
can vary from system to system, so it can be defined using the SQLNOT
directive.

MPE/iX 5.0 Documentation