The operating system powering a significant portion of mobile devices does not have a publicly declared “full name.” It is officially referred to as iOS, and the letters do not stand for a specific, expanded term. The consistent use of “iOS” serves as its identifier across various platforms and documentation.
Maintaining this consistent nomenclature provides brand recognition and avoids potential confusion that a longer, more descriptive name might introduce. This simplicity allows for clear communication regarding updates, features, and compatibility, benefitting both developers and end-users. Its initial release as “iPhone OS” reflected its initial device focus, which was later broadened.