Data Storage Requirements

Constants with names of the form VAL__NB$<$T$>$ represent the number of basic machine units (bytes) required to hold one value of each data type. All these constants are of type _INTEGER, with values as follows:

Constant	Type	Value
VAL__NBUB	_INTEGER	1
VAL__NBB	_INTEGER	1
VAL__NBUW	_INTEGER	2
VAL__NBW	_INTEGER	2
VAL__NBI	_INTEGER	4
VAL__NBR	_INTEGER	4
VAL__NBD	_INTEGER	8