The new PCalc software for the iPhone has a new “patent-worthy profanity filter” that filters out profanity created by typing in numbers such as “5318008″ into your calculator and turning it upside down.

Have you, or somebody close to you, ever turned your calculator upside down and accidentally seen a mildly suggestive word? Have you ever been in a maths class, and had to put up with groups of giggling boys performing elaborate calculations that are not part of the lesson?

Yes, it’s one of the main problems affecting the calculator industry today, the so-called “calculator words”. These otherwise harmless devices can be made to display smut at the press of a few buttons

Saving the world from mildy amusing words

Thank God for PCalc