In article <3856FDF4.A4796C01 at oblivion.nothing.com> Skywise <into at oblivion.nothing.com> writes: >Many types of time have been thrown about by their abbreviations (TT, TAI, >TCG, TDB, etc...) and I was wondering if there's an online resource where I >could learn all about them. Try http://tycho.usno.navy.mil/systime.html Patrick Wallace