  The cross sections and forward-backward asymmetries of hadronic and leptonic
events produced in e+e- collisions at centre-of-mass energies of 130-183 GeV
are presented. Results for ee, mumu, tautau, qq, bb and cc production show no
significant deviation from the Standard Model predictions. This enable
constraints to be set upon physics beyond the Standard Model such as
four-fermion contact interactions, leptoquarks, Z' bosons and R-parity
violating squarks and sneutrinos. Limits on the energy scale Lambda of eeff
contact interactions are typically in the range from 2-10 TeV. Limits on
R-parity violating sneutrinos reach masses of a few hundred GeV for large
values of their Yukawa couplings.
