THRU/THROUGH
The THRU keyword can be used to specify a set of members of a
record.
Syntax
record.first-member [ THRU | THROUGH ] record.last-member - record defines the record to be used.
 - first-member defines the member of the record starting the group of variables.
 - last-member defines the member of the record ending the group of variables.
 THROUGHis a synonym forTHRU.
Usage
The THRU keyword can be used in several instructions such as DISPLAY, PRINT, INITIALIZE, VALIDATE, LOCATE, to specify a list of record
members by using a starting member and an ending member.
Example
SCHEMA stores 
MAIN
  DEFINE cust LIKE customer.*
  INITIALIZE cust.cust_name THRU customer.cust_address TO NULL
END MAIN