Precision measurements at LEP2

Recent results from the OPAL collaboration based on the high energy 
data taken during the last years of LEP running are presented.
Cross-sections are measured for fermion-pair final states as well as
for the production of pairs of photons, Z- and W-bosons.
The high precision of these results allows us to determine 
Standard Model couplings and set limits on new physics.
Results from all four LEP collaborations are combined to improve
the results and obtain stringent tests of the electroweak theory.