See that mass of nuts, bolts, gears and belts above? You could walk into a dollar store today and buy a calculator that does more with the spare change in your pocket. Back in the 1960s, however, machines such as the German-built Hamann 505 were computing powerhouses and commanded a $1,000 price tag in the day's dollars, easy.
The stripped-down 505 pictured is one of some 50 machines in Mark Glusker's amazingly well-kept collection of antique rotary and printing calculators. Photographer Kevin Twomey swung by Glusker's home to take some pictures of the gorgeous machines' guts.
It really is a marvel, and that's half a century of progress. Soon, our computers may shed even more bulk by communicating with lasers, and fifty years again from now who knows what it'll all look like.