Astrology software

In 1978, Erlewine founded Matrix Software, and in 1980 he published a book with all the algorithms and data required for owners of microcomputers to make their own complete astrological programs.

Astrology programs usually come bundled with an electronic atlas, allowing the review of the longitudes, latitudes, and time zone observance histories for cities and towns.

[8][9] Many assemble interpretive text about the various element combinations in a chart into comprehensive printed reports.

One such tool is Swiss Ephemeris, which is an astronomical almanac developed by Astrodienst AG, Switzerland, the makers of Astrolog.

It is widely used for calculating the positions of planets, moons, asteroids, and stars for a given date and time.

Sample output from an astrology program. The table above the natal chart shows the birth time, location, and the positions of the planets in the signs and houses . The other table lists the aspects and their respective orbs .