411 REFERENCE · Wiktionary
SDOB
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
en abbreviations Abbreviation.
Noun
en US military en Secretary of Defense's Orders Book: A summary of the United States of America's force disposition, posture, availability, deployment, capabilities, plans, and the like. A highly-classified bimonthly publication of the U.S. Department of Defense.
en book