Inclusive Production of D* Mesons in Photon-Photon Collisions at               
sqrt(s)_ee=183 and 189 GeV and a First Measurement of F2^gamma_c               
  
 The inclusive production of charged D* mesons in photon-photon                
 collisions has been measured using the OPAL detector at LEP at                
 e+e- centre-of-mass energies  of 183 and 189 GeV. For events                  
 without an observed scattered electron (untagged), direct and                 
 single-resolved events are studied separately. Differential                   
 cross-sections as functions of the D* transverse momentum and                 
 pseudorapidity are presented in the kinematic region                          
 2 GeV < pt_D* < 12 GeV and |eta_D*| < 1.5. They are compared                  
 to next-to-leading order (NLO) perturbative QCD calculations.                 
 The total cross-section for the process e+e- --> e+e- c cbar                  
 where the charm quarks are produced in the collision of two                   
 quasi-real photons is measured to be 842 +- 97(stat) +- 75(syst) +- 196       
 (extrapol.) pb.  Using the tagged events, the charm                           
 structure function of the photon has been measured in the kinematic range     
 0.0014 < x < 0.87 and 5 GeV^2 < Q^2 < 100 GeV^2. The result is compared       
 to an NLO perturbative QCD calculation.                                       
  
 Parallel session : 3                  
 Plenary  session :11