The Powerful Google Search Box

The Google search box is really powerful, and does a lot of functions besides search. This is an example of over-loading, where one interface can do multiple tasks, depending on the context.

The minimal Google home page with its humble search box lets you track packages, convert currencies and measurements, find the local time in world cities, find movie show times, see sport results, and do math calculations.

Here is an article with more details on the Google search box.