The "white heat" speech
Taking the politics out of this for a second, I was fascinated to read the transcript of the original speech where Harold Wilson starts talking about clock speeds of the computers of the age (page 2 - about 3 microseconds per cycle if you are interested).
He also has a fair stab at explaining what a nanosecond is, because the next generation of machines would be 1000 times faster. Sounds like an early incarnation of Moore's Law to me.
Who'd have thought there was a time when politicians explained grown-up concepts with the assumption that their audience weren't morons?