TB (See also Travel Bug)

Travel Bug
(Submitted by TechBlazer)

TFTC

Thanks for the cache
(Submitted by TechBlazer)

TFTH

Thanks for the hunt
(Submitted by TechBlazer)

TNLN

Took nothing, left nothing
(Submitted by TechBlazer)

TNLNSL

Took nothing, left nothing, signed log
(Submitted byTechBlazer)

Travel Bug

A Travel Bug is a registered trademark of Groundspeak, Inc. used to describe a dogtag used in Geocaching. It is moved from cache to cache, and its travels can be logged on the geocaching website (www.geocaching.com). Each travel bug tag is printed with a unique PIN, which is needed to post a log online. Some tags are fastened to an object, such as a plastic figurine, before they are let loose.

Travel bugs are tracked on the Groundspeak-owned website Geocaching.com, but there are a number of other tracking sites such as Geotag Tracker or Traveler Tags that log other trackable items.

Some travel bugs have missions to travel to a specific cache, location or a certain type of location. Other travel bugs simply have the goal of traveling as far and widely as possible.
(Description from Wikipedia - can you write this better? Follow the submit link below.)

Suggest a Geocaching term