Rabbi Yosef Caro published the Shulchan Aruch, the Code of Jewish Law. This concise codification of all Jewish law which is germane today was an extension of his Beit Yosef commentary (see entry for the 11th of Elul).
The Shulchan Aruch is divided in to four sections: Orach Chaim details the laws pertaining to daily life, lifecycle events, and holidays. Yoreh De'ah. laws which a practicing rabbi must be proficient in, such as complex nuances of the kosher laws, laws of mikvah, and laws of slaughtering. Even Ha'ezer, laws of marriage, divorce, reproduction, and the like. Choshen Mishpat, monetary and judicial laws; required study for a member of a rabbinical court.
To this very day, the Shulchan Aruch serves as the primary halachic guide for Jewish life.
Links:
Rabbi Yosef Caro- The Master
When matter and energy were created from the void, every invention we will ever conceive was created along with them.
As the world moves toward its fulfillment, each discovery emerges, each in its proper time.
In these times, every new technology has one purpose only: to prepare the world for its ultimate destiny, a time when the physical eye will see the divine energy that sustains all things.