Search for Higgs Bosons in e+e- Collisions at 183 GeV                          
  
The data collected by the OPAL experiment at sqrt(s)=183 GeV were used to      
search for Higgs bosons which are predicted by                                 
the Standard Model and various extensions, such as general models with         
two Higgs field doublets and the Minimal Supersymmetric Standard Model (MSSM). 
The data correspond to an integrated luminosity of approximately 54~\pb.       
None of the searches for neutral and charged Higgs bosons have revealed        
an excess of events beyond the expected background. This negative outcome,     
in combination with similar results from searches at lower energies, leads     
to new limits for the Higgs boson masses and other model parameters.           
In particular, the 95 % confidence level lower limit for the mass of           
the Standard Model Higgs boson is 88.3 GeV.                                    
Charged Higgs bosons can be excluded for masses up to 59.5 GeV.                
In the MSSM, mh > 70.5 GeV and mA > 72.0 GeV are obtained                      
for tan{beta}>1, no and maximal scalar top mixing and                          
soft SUSY-breaking masses of 1 TeV.                                            
The range 0.8 < tan(beta) < 1.9 is excluded for minimal scalar                 
top mixing and m_top < 175 GeV.                                                
More general scans of the MSSM parameter space are also considered.            
  
 Parallel session :11                  
 Plenary  session :7a