  The Les Houches Workshop on Physics at TeV Colliders took place from June
8-18, 1999. One of the three working groups at Les Houches concentrated on QCD
issues, both at the Tevatron Collider and at the LHC. Besides the interest in
QCD in its own right, QCD dynamics plays an important role in the production
mechanisms for any new physics process that might be observed at either
collider, as well as any processes that may form backgrounds to the new
physics. This writeup serves both as a pedagogical overview of QCD as well as
an update on the current status of the field.
