$O(a)$ Improvement for Quenched Wilson Fermions
  We briefly describe some of our recent results for the mass spectrum and matrix elements using $O(a)$ improved fermions for quenched QCD. Where possible a comparison is made between improved and Wilson fermions. 
S. Capitani, M. Goeckeler, R. Horsley, B. Klaus, H. Oelrich, H. Perlt,   D. Petters, D. Pleiter, P. Rakow, G. Schierholz, A....