A Fortran code for the scattering of electromagnetic plane waves from two infinitely long penetrable cylinders with circular cross sections at normal incidence is presented. The radius and the refractive index of each cylinder are arbitrary as well as the separation of the cylinders. The program calculates the Mueller scattering matrix elements (Sij), various cross sections, and the square of the scattered amplitutes. All computations are done by using single precision arithmetic procedures. The code can be run on many different computers with minor modifications. The restrictions for each of the supported environments and the range of input parameters (size parameter, refractive index, and the separation of the cylinders) are discussed. To our knowledge, such a code has not been presented before. © 1990.