USELESS

When Irving S. Olds was chairman of the U.S. Steel Corporation, he arrived for a stockholders' meeting and was confronted by a woman who asked, "Exactly who are you and what do you do?" Without batting an eye, Olds replied, "I am your chairman. Of course, you know the duties of a chairman--that's someone who is roughly the equivalent of parsley on a platter of fish." 

Bits and Pieces, June 27, 1991, p.7.

As with many innovations, the originator of 3M's sticky yellow Post-its didn't know what he had--at first. Researcher Spence Sliver was curious about what would happen if he mixed an unusual amount of monomer into a polymer-based adhesive he was working on. The result was an adhesive that would "tack" one piece of paper to another and even restick, without leaving any residue on the second piece of paper. 

The company had no use for the new adhesive until 3M chemist Arthur Fry began having problems in the choir loft. The slips of paper he used to mark pages in his hymnal often fluttered to the floor, leaving him frantically searching for his place. Then he remembered Silver's adhesive. Fry's better bookmark soon metamorphosed into the handy Post-its that have become a fixture in offices throughout the country.

Discipleship Journal, Issue #48, p. 28.