On the subject of the term UFO.

The term Unidentified Flying Object is perfectly fine. But then some people say "Aha, you mean aliens, right". No, It is like the SQL NULL, No unidentified object matches any other unidentified object. If I meant aliens I would have said it was an Identified Flying Object(IFO) or perhaps an Extrateresteral Flying Object(EFO), But all I said was that something was flying and I could not identify it. Once you identify it, it is no longer a UFO.

Apparently The military abandoned the term UFO mainly because enough people attached more meaning to the term than it actually has. And it got awkward to use because of that attached meaning.