What does IOS stand for?

The list of IOS abbreviation meanings.

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2
Inter-Operability Specifications(US Post, Postal, Military)
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For more, try IOS on ALL ACRONYMS DICTIONARY
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APASmart Define. (2017). ios. Retrieved September 24, 2026, from http://smartdefine.org/ios/abbreviations/f/US_Post
ChicagoSmart Define. 2017. "ios" http://smartdefine.org/ios/abbreviations/f/US_Post (accessed September 24, 2026).
HarvardSmart Define 2017, ios, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/ios/abbreviations/f/US_Post>.
MLASmart Define. "ios" 1 December 2017. Web. 24 September 2026. <http://smartdefine.org/ios/abbreviations/f/US_Post>