There are hundreds of religions in this world. Of them two are the most prominent. Islam and Christianity. It is averaged that there are 750 million people practicing Islam, and another 1 billion practicing Christianity. The start of Islam is actually derived form Christianity, history books indicates that one night in the year 610, the first of many revelations came to Muhammad from God by way of the angel Gabriel (In Christianity this is the same Angel which brings the news of Jesus' birth, Jesus of course is the founder of Christianity). The message Muhammad received told him that there was but one God (Identical to the inception of the Ten Commandments), not many gods, as most Arabs believed. This God was creator of the world (In Christianity, it's documented in Genesis Chapter 1 verse 1, In the beginning God created the heavens and the earth), and He would one day judge mankind (This is also true in Christianity: "The Lord will judge his people."
Hebrews 10:30). Both of these religions share almost the same framework, but they also differ in many ways.
The word Islam means "surrender" or "submission," submission to the will of Allah, the one God. Muslims are those who have submitted themselves. The basic creed of Islam is brief: There is no God but Allah, and Muhammad is the Prophet of Allah. Islam teaches that there is one God, the creator and sustainer of the universe. This God, Allah, is compassionate and just. Because He is compassionate, He calls all people to believe in Him and worship Him. Because He is also just, on the Last Day He will judge every person according to his deeds. On the Last Day, all the dead will be resurrected and either rewarded with heaven or punished with hell.