Dr. Roy Walford's Interactive Diet Planner (DWIDP) software is available to supporting members of the Calorie Restriction Society. This software was developed by Dr. Roy Walford, based on his thirty years of research into Calorie Restriction. Information about the DWIDP program and a free demo version is available at www.walford.com. Supporting society members may download the full version of DWIPD from the Members only area.