Acquisition and Processing of Pure and Converted Shear Waves Generated by Congressional Wave Sources.- Data Acquisition and Pre-Processing Required for Simultaneous P-SV Inversion.- Two-Component Recording with a P-Wave Source to Improve Seismic Resolution.- Perfect Zerophase Sections, Fact or Fiction?.- Exact Time-Domain Solutions for Acoustic Diffraction by a Half Plane.- Constant Velocity Migration in the Various Guises of Plane-Wave Theory.- Reverse Time Migration of CMP-Gathers an Effective Tool for the Determination of Interval Velocities.- Parallelism in Seismic Computing.