O1: Officer grade: Ensign or 2nd Lieutenant
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Others
Language: English
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What is the full form of O1?
O1 stands for Officer grade: Ensign or 2nd Lieutenant. Fullformexpand.com has 1 other full form for abbreviation O1.
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"O1." Fullformexpand.com, https://www.fullformexpand.com/o1/officer-grade-ensign-or-2nd-lieutenant. Accessed 20 Feb. 2026.
Fullformexpand.com, 2026. "O1." Accessed February 20, 2026. https://www.fullformexpand.com/o1/officer-grade-ensign-or-2nd-lieutenant.
"O1." (n.d.). Fullformexpand.com. Retrieved February 20, 2026, from https://www.fullformexpand.com/o1/officer-grade-ensign-or-2nd-lieutenant.
O1. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/o1/officer-grade-ensign-or-2nd-lieutenant (Accessed: 20 February 2026).
Found 1 other full form for O1 →
| Term | Full Form | Category |
|---|---|---|
| $O1 | Pipe file (DOS)
| Others |
View All Abbreviations →
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