This document  explains how to compile and link a Fortran 90 program using fftw3 libraries. It is provided in .tm and .pdf formats. The .pdf format is good if you want print the document. The .tm format is useful, if you want to modify the document. Also, if you happen to modify the document, and if you think the modifications could be useful to others, please send the final version to me. So that I can incorporate those changes here.