DiInSo is a free software application developed by Radiology Software International Ltd. It is a Windows-based software that is freely available for download on the Internet. DiInSo is ideal for medical laboratories and other radiology centers that require detailed real-time data analysis, in order to determine clinical outcomes and pre-determined treatment procedures. DiInSo has many advanced features that allow for fast data analysis and provides comprehensive diagnostic information on both images and patients. The software package also enables quick application of algorithms and other methods with a focus on numerical accuracy and processing speed, reducing the amount of processing time and increasing the efficiency of the overall system. DiInSo was developed to solve direct three-dimensional (3D) and two-dimensional (2D) electric resistivity tomography (ERP) problems on dc. Compared to other packages in its class, the free software DiInSo is ideal for low-complexity cases and for rapid image processing. The 32 bit version of the application is ideal for educational and research purposes and is free to download on the Internet. The DiInSo software application has been developed to run on Windows server platform and is available for cross-platform and unix systems. Users of the software find it easy to learn and implement and it can handle most of the complex imaging requirements. The DiInSo is a user-friendly package that solves technical, regulatory and other quality issues related to electrical resistivity tomography. The software contains several tools like the Shape viewer, the variance viewer, the tensor view and the real axis viewer. It can also be used to manage and edit the complex physical parameters like the tres dimensions, the coordinates, the kurtz, the displacement function, the kinematics parameters, the focal length and the focus. DiInSo is a comprehensive software that provides complete control over the physical processes involved in tomography using the conventional images. The software can also be used to generate high resolution digital images from lower resolution analog images. The application facilitates creation of orthometric and cross-modal tomograms, stereo (axial) and dispersion tomograms, as well as the surface tomograms.