Geocaching abbreviations

Geocaching logs and descriptions are often littered with abbreviations and some are more straightforward than others. These are the few more common abbreviations that initially had me flummoxed. 

BOT - Bottom Of Tree

DNF - Did Not Find. Used in logs to show the geocache wasn't found. 

FTF - First To Find. Denotes the first geocacher to find a new geocache. 

GZ - Ground Zero. The point where your GPS device shows that you have reached the geocache location. At ground zero, you are zero feet (or zero meters) away from your destination.

MTT - Multi Trunked Tree

SL - Signed Log. 

TB - Travel Bug. A trackable tag with a unique code that attaches to an item. This allows you to track your item on Geocaching.com. The item becomes a hitchhiker that is carried from cache to cache (or person to person) in the real world and you can follow its progress online.