Under popular demand, this is a list of acronyms used on this blog. To be updated on a regular basis.

CCC Courmayeur - Champex - Chamonix (98km +5,600m)
COs the Chosen Ones, an informal group of ultra-runners led my Mike M.
DNF Did Not Finish
OMM Original Mountain Marathon
PB Personal Best
PBR Paddy Buckley Round (104km +8,700m)
PTL La Petite Trotte à Léon (245km +21,590m)
TDS Sur les Traces des Ducs de Savoie (105km +6,700m)
TSQ Thames Source Quest - a creation of my own :)
UTMB Ultra-Trail du Tour du Mont-Blanc (166km +9,400m)
VFF Vibram Five Fingers

Ultra acronyms