Tension Instructions in a Knitting Pattern

This is an example of tension instructions in a knitting pattern
http://www.garnstudio.com/lang/en/pattern.php?id=5317&lang=en


Some useful links:
http://www.dummies.com/how-to/content/terms-and-abbreviations-used-in-knitting-patterns.html
http://www.knittinghelp.com/videos/knitting-glossary

Inspiring blog: This blog gives clear examples of abbreviations and tension instructions. Note tension is also called gauge
http://www.purlbee.com/beginners-knits/
http://www.purlbee.com/the-purl-bee/2011/8/21/whits-knits-sunshine-scarf.html