OS1: Officer's Steward 1st Class (non Petty Officer)
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Others
Language: English
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What is the full form of OS1?
OS1 stands for Officer's Steward 1st Class (non Petty Officer). Fullformexpand.com has 1 other full form for abbreviation OS1.
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"OS1." Fullformexpand.com, https://www.fullformexpand.com/os1/249213. Accessed 20 Nov. 2025.
Fullformexpand.com, 2025. "OS1." Accessed November 20, 2025. https://www.fullformexpand.com/os1/249213.
"OS1." (n.d.). Fullformexpand.com. Retrieved November 20, 2025, from https://www.fullformexpand.com/os1/249213.
OS1. (2025). Fullformexpand.com. Available at: https://www.fullformexpand.com/os1/249213 (Accessed: 20 November 2025).
Found 1 other full form for OS1 →
| Term | Full Form | Category |
|---|---|---|
| OS1 | Operations Specialist Petty Officer 1st Class
| Others |
View All Abbreviations →
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