The Three-Day Shiva Nothing in Jewish tradition supports the concept of sitting shiva for three days. The actual word shiva is related to the word meaning seven. The number seven in Judaism is very significant, for it symbolizes completion in this world, as in the seven days of creation.
An officer holding the rank of major or lieutenant colonel or colonel. Classified under: Nouns denoting people. Synonyms: field officer; field-grade officer; FO. Hypernyms (field-grade officer is a kind of...): commissioned military officer (a commissioned officer in the army or air force or marine corp) Domain category:
Depending on the specialization and duty-status of the officer, DCOs as they're called, will attend either Officer Indoctrination School (OIS), Officer Development School (ODS), or Direct Commission Officer School (DCO School) which vary from two weeks duration for certain Reserve DCOs to five weeks duration for Active Duty DCOs.