Traditional division and interpretation of the Ten Commandments

1. "I am the LORD your God who brought you out of the land of Egypt, from the house of slavery. You shall have no other gods before Me..."
   This commandment is to believe in the existence of God and His influence on events in the world, and that the goal of the redemption from Egypt was to become His servants (Rashi). It prohibits belief in or worship of any additional deities.
   


2. "Do not make an image or any likeness of what is in the heavens above..."
   This prohibits the construction or fashioning of "idols" in the likeness of created things (beasts, fish, birds, people) and worshipping them.
   


3. "Do not swear falsely by the name of the LORD..."
   This commandment is to never take the name of God in a vain, pointless or insincere oath.
   


4. "Remember [zachor] the Sabbath day and keep it holy" (the version in Deuteronomy reads shamor, "observe")
   The seventh day of the week is termed Shabbat and is holy, just as God ceased creative activity during Creation. The aspect of zachor is performed by declaring the greatness of the day (kiddush), by having three festive meals, and by engaging in Torah study and pleasurable activities. The aspect of shamor is performed by abstaining from productive activity (39 melachot) on the Shabbat.
   


5. "Honor your father and your mother..."
   The obligation to honor one's parents is an obligation that one owes to God and fulfills this obligation through one's actions towards one's parents.
   


6. "Do not murder"
   Murdering a human being is a capital sin.
   


7. "Do not commit adultery."
   Adultery is defined as sexual intercourse between a man and a married woman who is not his wife.
   


8. "Do not steal."
   According to Rashi, this is not understood as stealing in the conventional sense, since theft of property is forbidden elsewhere and is not a capital offense. In this context it is to be taken as "do not kidnap."
   


9. "Do not bear false witness against your neighbor"
   One must not bear false witness in a court of law or other proceeding.
   


10. "Do not covet your neighbor's wife"
    One is forbidden to desire and plan how one may obtain that which God has given to another. Maimonides makes a distinction in codifying the laws between the instruction given here in Exodus (You shall not covet) and that given in Deuteronomy (You shall not desire), according to which one does not violate the Exodus commandment unless there is a physical action associated with the desire, even if this is legally purchasing an envied object.
    

Source: Wikipedia
http://en.wikipedia.org/wiki/Ten_Commandments