UVI is the "Military Information Management Board" and MO is the "Office of Military Publishing of the Ministry of Defense".
Voenizdat (Military Publishers) or voennoe izdatelstvo was the Military Publishing House of the Ministry of Defense of the USSR. Established in Moscow by the Revolutionary Military Soviet in 1919, Voenizdat published literature for the defense industry such as technical manuals and dictionaries. It also published posters, pamphlets and fiction and non-fiction literature frequently containing military themes. Voenizdat's predecessor was Litizdat, the publishing arm of the Department of the Revolutionary Military Council.