The vedic dasa system is the most potent predictive tool for an astrologer. Vedic astrology has more than a hundred dasa systems with Vimshottari dasa on the lead and Panchaswara dasa etc. almost forgotten. The golden key to deciphering the correct dasa for a chart is missing. In this book the dasas have been classified and their basis of computation explained. The astrological tools like Argala, Arudha etc. have been employed to bring forth their applicability, method of timing of events pertaining to sources wealth (including property, fortunes, vehicles) of income & loss, education (both, formal and informal, including intelligence research skills etc.), Marriage (wedding or denial, divource extra-marital relations, loss of spouse etc.), children (fertility, number of pregnanies, sex of child, adoption, their future) co-borns (number, birth, good/evils), profession & career (Nature of Job, achievements career graph Rajyogas, Dhanyoga etc.) and even spiritual attainments. Specific details on timing of death, renunciation etc. have been explained.