EAS3 is a toolkit that has been developed at the Institut für Aerodynamik und Gasdynamik (IAG) of the Universität Stuttgart and is the successor of EAS2. It is meant to exchange floating-point data according to IEEE standard between different computers, to postprocess the data and to convert it into other data formats.The data is organized as parameters with one parameter being a one-, two- or three-dimensional floating point array. Several of these parameters may be combined to one time step. The number of elements per parameter and the number of parameters per time step are constant in one file. What's New in This Release: · literal constants specified with _rk · small bug in n3dlib/intpolmod.F90 corrected