The cross sections and forward-backward asymmetries of hadronic and leptoni
c events produced in e(+)e(-) collisions at centre-of-mass energies from 13
0 to 183 GeV are presented. Results for e+e-: mu(+)mu(-), tau(+)tau(-), q (
q) over bar, b (b) over bar and c (c) over bar production show no significa
nt deviation from the Standard Model predictions. This enables constraints
to be set upon physics beyond the Standard Model such as four-fermion conta
ct interactions. leptoquarks, Z' bosons and R-parity violating squarks and
sneutrinos. Limits on the energy scale Lambda of e(+)e(-) f (f) over bar co
ntact interactions are typically in the range from 2 to 10 TeV. Limits on R
-parity violating sneutrinos reach masses of a few hundred GeV/c(2) for lar
ge values of their Yukawa couplings.