MIL-HDBK-1280, DEPARTMENT OF DEFENSE HANDBOOK FOR KEYBOARD ARRANGEMENTS (20 FEB 1998)., This standard establishes the assignment of the 128 characters of the Military Standard Code for Information Interchange and 54 of the 57 "American" characters of USASCSOCR X3.17-1966 to keys in a typewriter-like keyboard arrangement for application where the textual information has a high alpha content.
MIL-HDBK-1280 (NOTICE 1), DEPARTMENT OF DEFENSE HANDBOOK FOR KEYBOARD ARRANGEMENTS. To all holders of MIL-STD-1280: The following pages of MIL-STD-1280 have been revised and supersede the pages listed.