Always check the organization website for the correct data and race info!

XTERRA: Offroad triathlon events, organised by XTERRAplanet, http://www.xterraplanet.com/index.html
XTERRA-DE: XTERRA German Tour, http://www.xterra-german-tour.de/
X-Trails Tour: Offroad race events, http://www.xtrails-regiotour.de/
ETU: European Triathlon Union, http://etu.triathlon.org/
ITU: International Triathlon Union, http://www.triathlon.org/
TNatura: Crosstriathlon events, organised by ETU/ITU, http://www.tnaturaevents.com/
NC: National Championships
Open NC: Open National Championships
EC: Europian Championships
WC: World Championships