OnePlus And Cyanogen Inc. ended their relationship last year and after putting a team together OnePlus began developing ROMs for the OnePlus One. And this ROMs needed a name. So OnePlus decided to held a contest and see what name would win. And the winning name is OxygenOS.
Here’s how the company explain this name on their announcement post:
Oxygen is all around us. It’s part of us and everything we do. It creates the water that carves out valleys and moves mountains. By itself, it’s simple and pure—a fundamental building block. But, as a part of something greater, it can do amazing things. Just like us.
But the company doesn’t stop here. OnePlus is developing two different ROMs: OxygenOS for use in global markets, and H2OS for the Chinese one.