@wikkit Ferroelectric RAM dates back to the early 1950s, strangely enough. This photo from Scientific American, 1955, shows a 256-bit memory constructed by Bell Labs.
Abbreviating lead as P kind of makes sense since lead is Pb; all three elements lose their second letter in PZT. Oxygen got dropped entirely from the abbreviation.
@kenshirriff I read the wikipedia article about the inventor, he seemed super bright and I have to wonder what he would have done with the second half of his life.