[1] Allah is God’s most unique name.
[2] The Arabic term "rabb" (translated as "Lord") includes all of the following meanings: "owner, master, ruler, controller, sustainer, provider, guardian and caretaker."
[3] "the worlds" means mankind, jinn, and all that exists.
[4] Ar-Rahmān and Ar-Raheem are two names of Allah: Rahmān is used only to describe Allah, while raheem might be used to describe a human as well. Rahmān carries a wider meaning - merciful to all creation. Justice is a part of this mercy. Raheem includes the concept of specialty - especially merciful to the believers. Forgiveness is a part of this mercy. In addition, Rahmān is adjectival, referring to an attribute of Allah and is part of His essence. Raheem is verbal, indicating what He does: i.e., bestowing and implementing mercy.
[6] The way of the Prophets and those who follow them.
[7] Those who know the Truth and do not follow it, like the Jews.
[8] Those who are ignorant of the Truth and follow misguidance, like the Christians.