Since July 1, 1969, the Marine Corps has been operating a new, third-generation system in which OCR is the keystone. The concept of the new system is simple. The company clerk types his report and sees that it is delivered to the data center. ... The unit is then given a listing of all transactions accepted and rejected with indication of any corrective action required. ... a one-for- one relationship between the specified set of English- language statements and system transaction codes.