Full form of OS1 is Operations Specialist Petty Officer 1st Class
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Others
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English
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Frequently Asked Questions
What is the full form of OS1?
OS1 stands for Operations Specialist Petty Officer 1st Class. Fullformexpand.com has 1 other full form of OS1 abbreviation.
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"OS1." Fullformexpand.com, https://www.fullformexpand.com/os1/operations-specialist-petty-officer-1st-class. Accessed 14 Apr. 2026.
Fullformexpand.com, 2026. "OS1." Accessed April 14, 2026. https://www.fullformexpand.com/os1/operations-specialist-petty-officer-1st-class.
"OS1." (n.d.). Fullformexpand.com. Retrieved April 14, 2026, from https://www.fullformexpand.com/os1/operations-specialist-petty-officer-1st-class.
OS1. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/os1/operations-specialist-petty-officer-1st-class (Accessed: 14 April 2026).
| Abbreviation | Full Form | Category |
|---|---|---|
| OS1 | Officer's Steward 1st Class (non Petty Officer) |
Others
|
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OS1 Full Form
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