02.03.03

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[02.03.03]

3. The following key words may be used as Procedure and Data names providing it is not necessary to reference the procedure or data items in the Environment Division:

   ACTIVITY	COM	LOW	SEQ
   BCD	CONSERVE	MULTI	SERIAL
   BINARY	CONTROL	NO	SPACE
   BLOCK	DEFER	OPENCOUNT	SPANS
   BLOCKSIZE	ERROR	OPENF	TAPE
   BUFFERCOUNT	FIND	OPENW	THROUGH
   CARD	HIGH	OUTPUT	TIME
   CHECKC	HOLD	PLACE	UNIT1
   CHECKF	INPUT	PRIMARY	UNIT2
   CHECKPOINT	KEYS	REEL	WORD
   CKSUMS	LABEL	RETAIN
   CLOSER	LABELN
   CLOSEW	LABELS
   COLLATE	LENGTH

C. Name Qualification

Qualified names may not be used in the Environment Description or in CRYPT instructions. Data and Procedure names used in these sections must be of one word only. The verb CALL enables the programmer to reduce a qualified name to a one-word name to fulfill this requirement.

D. Effect of Data Storage Mode on Arithmetic Efficiency

Arithmetic operations are performed only in the internal (binary) mode. For this reason it is advantageous to have fields used in arithmetic operations in the internal mode when the programmer has a choice. If the fields are in the external mode and reoccur in different arithmetic statements, it is generally more efficient to MOVE this data to an area which has been defined with the mode as internal. This area would be referenced when the fields are used in arithmetic statements.

Consider the following examples:

Assume the following Data Description