Operating system-independent version of EGS_WINDOWS in MATLAB for interactive 3D visualization of BEAMnrc Monte Carlo Simulations. This Matlab program is similar to EGS_WINOWS. Some of the routines are a line by line translation of the original EGS_WINDOWS source code from C++ to Matlab. The name of the functions and most of the variables were kept same. A typical output of the program is shown below. The user interface was kept simple and all plot properties can be changed easily using Matlab interactive toolbar and menu or within the source code. This program is freely available for all users to download from here. Please do not delete the header of the file.