This software package represents the easiest and most immediate solution when you need to carry out the inversion of refraction seismics data in Windows. The picking of the first arrivals may be done on any file in SEG-2, KGS or ES-1225 format (without AGC), using the “zoom” and “scroll screen” functions. WinSism enables all typical operations for refraction processing including: first break picking, trace phantoming, true velocity, velocity computation, intercept time method, delay method, GRM method. It can also import all usual seismic file format as well as export in raster or vector output. Winsism has been successfully tested and runs under every Microsoft Windows© version from 95 to Seven.