Vedic Astrology is divided into 3 Skandas (Branches):
Siddhanta or Ganita Skanda: Calculation in astrology (Mathematics).
Samhita Skanda (Mundane astrology): Predictions about countries such as wars, earth quakes, politics, weather, financials, electional astrology, Vaastu, animals, Natural calamities etc.
Hora Skanda: Interpretation of horoscopes.
Different Sages/Scholars used different methods for interpretation of horoscopes. Some of the popular methods are as follows:
A. Parasara Astrology (The Bhagadgeetha of astrology “Bruhat Parasara Hora Sastra” by Sage Parasara was written on this method of astrology)
B. Jaimini Astrology
C. Tajika Astrology
D. Nadi Astrology
E. Muhurtha Astrology
F. Prashna Astrology
G. Krishnamurti Paddhati (KP System)