To find a Web page you wanted in the pre-Google era, you often had to guess at its address. Was General Motors generalmotors.com, general-motors.com, or gm.com? This led to all kinds of trouble—a ...

There was a time when TinyURL was all you needed to get control of a monster-sized URL that you wanted to share with friends. Now, Google and Facebook are getting into the link shortening business, ...