Horary, which was practiced extensively in the 17th century and is becoming popular again, is the art of interpreting a chart erected for the time a particular question is asked. Some contemporary astrologers erect a chart for the time the client first calls, or the time of the appointment, and read it as a horary. Electional astrology is used to select the best time for a specific event, most often for a wedding or incorporation of a business. Both horary and electional use the same rules and can be studied through classes, correspondence courses or books. Some astrologers specialize in vocational astrology, a modern application used to help people find a suitable career.
Mundane astrology is the study of the charts of nations and world events.
Often, the most immediate world events are presented at these conferences, making the subject relevant and stimulating. Medical astrology has ancient roots, as physicians were once astrologers as well, and there are many contemporary branches. Generally speaking, this involves looking at a chart for indications of physical conditions. The underlying causes of illness, timing for surgery, or expected course of treatment are questions traditionally addressed, although there are astrologers who use the chart for preventative health. A contemporary astrologer who writes for TMA and other publications about medical astrology is Marcia Starck.