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No, they use it for something in between. I don't know who started that craze, but it wasn't what I was taught in school in 1973. I learned in school in 1973 that a billion is a million times a million. That must be correct, partly because I got 100% in my maths exam in 1974 and partly because the word "billion" is self-defining. The prefix "bi" means "two", so it's a million to the power of two (i.e. a million squared or a million times a million). According to both the science of mathematics and the science of linguistics, it couldn't possibly be anything else but that.
My excellent apple pie.
Were you a Slade fan in the 1970s, Pupoid? The reason I ask is because you said "an apple a day keeps the doctor away (but an onion a day keeps everybody away)", which was included in the lyrics of Slade's 1975 hit song "Thanks For The Memory". Remember?