Objecto Oriented Finite Element Analysis of Real Material Microstructures __________________ OOF is designed to help materials scientists calculate macroscopic properties from images of real or simulated microstructures. It is composed of two cooperating parts: ppm2oof and oof. ppm2oof reads images in the ppm (Portable Pixel Map) format and assigns material properties to features in the image. oof conducts virtual experiments on the data structures created by ppm2oof to determine the macroscopic properties of the microstructure. Currently, the programs calculate stresses and strains, but someday we hope to include thermal, electric, and magnetic field calculations. Check the Homepage for online manuals and new versions WWW: http://www.ctcms.nist.gov/oof/