Designed in 1973, this Xerox Diablo HyType I catalog has not lost a drop of awesome. The minimal cover art, while seemingly arbitrary at first glance, takes on a second meaning after you learn what Xerox is selling. Diablo Systems (acquired by Xerox in 1972) developed the first commercially successful daisy-wheel printer. Simply referred to as a daisy, it consists of a round plastic or metal disk with 96 petals, each carrying a glyph. The operator could snap in different character wheels to change type styles or fonts. The spectral asterisk icon, then, symbolizes the possibilities that can be achieved with one of the fastest daisy-wheel printers of its time. Without this knowledge, the cover is still gorgeous, but knowing makes it all the more lovely.