Multiple choice technology mainframe COMM is DOUBLE WORD BINARY FULL WORD BINARY FULL WORD HALF WORD BINARY Reveal answer Fill a bubble to check yourself D Correct answer Explanation COMM is a half-word binary field (2 bytes). In IBM mainframe terminology, HALF WORD = 2 bytes, FULL WORD = 4 bytes, DOUBLE WORD = 8 bytes. COMM specifically uses the half-word format.