“Though it feels like a modern appendix to our ancient alphabet, the ampersand is considerably older than many of the letters that we use today. By the time the letter W entered the Latin alphabet in the seventh century, ampersands had enjoyed six hundred years of continuous use; one appears in Pompeiian graffiti, establishing the symbol at least as far back as A.D. 79. […] As both its function and form suggest, the ampersand is a written contraction of “et,” the Latin word for “and.” Its shape has evolved continuously since its introduction, and while some ampersands are still manifestly e-t ligatures, others merely hint at this origin, sometimes in very oblique ways.” [Typography, via Kottke]