Astrolog is a many featured and customizable astrology chart calculation program. It features wheels, aspects, midpoints, relationship charts, transits, progressions, simple interpretations, astro-graphy, local horizon, constellations, planet orbits, dispositors, various influence charts, biorhythms, different zodiacs, central planets, 15 house systems, 8400 year ephemeris, asteroids, Uranians, fixed stars, Arabic parts, script files and macros, smooth animation of charts, and graphics export to bitmap, Windows metafile, and PostScript formats. For those familiar with programming, Astrolog's complete source code is available separately.