This software works under Windows® 32 and 64 bits It takes benefit of its display qualities, uses all the peripherals for printing and allows the transfer of the graphs by copy-and-paste and as metafiles. The use of the software is easy and intuitive. The measured values and the spread geometry can be loaded as ABEM, Syscal or Geotrade files or be entered conveniently in a spreadsheet. The electric model can be proposed by the user or calculated automatically by the software starting from the measured values (inverse modelling). In both cases, the software allows automatic adjustment (least squares) of the model. During adjustment, it is possible to fix any of the resistivities and thicknesses, for example for the calibration on a nearby mechanical survey.