Decoding the information on your MagStrip

http://stripesnoop.sourceforge.net/screenshots.html

Stripe Snoop is a suite of research tools that captures, modifies, validates, generates, analyzes, and shares data from magstripe cards. The data is captured through different hardware interfaces (or stdin), the contents decoded into the correct character set, and then a CDDB-like database attempts to figure out what the contents mean.