The data, based on visits to U.S. government websites, also shows that despite being the most popular operating system, Windows is losing its grip on the market.

ZDNet's global readers favorite operating systems largely track those of American government visitors, but with some interesting differences.

Apple created the operating system iOS for its iPhone. Since its debut, Apple has added features to the software and released new versions.

The newest operating system from Apple, iOS 17, is set to be released Monday. Here's what to know about it.