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Even before the iPhone came out, people used the abbreviation "app" for "application".

Source: I was around then ;)

True, especially with OS X having .app file extensions. I still called them "Applications" more often than not though.

Oh, so it's like a Mac thing. So why do we have to call Windows programs 'App'?

It's not a Mac-only thing, it has been used on Linux and Windows for decades.

But did they use "app" instead of "program"?