There's a famous story about early UI fail in some CAD software.<p>Icons had just come into vogue (yes, there was a time before icons). The CAD system in question used a puck on a big mat to choose functions from a grid of names, which were labels like GRAPH and CONNECT and DEL and so forth. But all-caps names weren't very sexy, so the company decided to replace them with more intuitive icons, cool little pictures of the operations. Getting rid of the tiresome and uncool simple text labels was going to win back market share!<p>Predictably, users complained that they had a hell of a time trying to figure out which of the tiny, intuitive pictures corresponded to the concrete operations.<p>The company's response? Supply users with a printed cheat sheet that let them find the icon for each operation. To do a CONNECT, you'd look at the cheat sheet and find the corresponding essentially arbitrary (but intuitive!) squiggle, then search for the intuitive squiggle in a sea of other intuitive squiggles. ("No, not that one!")