The Dispensation of Innocence - Gen. 1:31 - "And God saw every thing that He had made, and, behold, it was very good. And the evening and the morning were the sixth day."
The Dispensation of Conscience - Gen. 3:8 - "And they heard the voice of the LORD God walking in the garden in the cool of the day: and Adam and his wife hid themselves from the presence of the LORD God amongst the trees of the garden."
The Dispensation of the Law - Ex. 24:12 - "And the LORD said unto Moses, Come up to me into the mount, and be there: and I will give thee tables of stone, and a law, and commandments which I have written; that thou mayest teach them." This dispensation is said to have ended with the coming of Jesus Christ. Luke 16:16 says, "The law and the prophets were until John," and John 1:17 says, "For the law was given by Moses, but grace and truth came by Jesus Christ."
The Dispensation of the Gospel - 1 Cor. 9:17 - "For if I do this thing willingly, I have a reward: but if against my will, a dispensation of the Gospel is committed unto me." (Note: it is also called the dispensation of Grace in Eph. 3:2).
The Dispensation of the Kingdom - Eph. 1:10 - "That in the dispensation of the fulness of times He might gather together in one all things in Christ, both which are in heaven, and which are on earth; even in Him."
Today, two dispensations exist at the same time; the Jews, by rejecting Christ (Jn. 1:11), remain under the Dispensation of the Law, while the Church, accepting Jesus as Lord (Jn. 1:12), exists in the Dispensation of Grace. The Dispensation of the Law will end when Israel recognizes Jesus Christ at the end of the Tribulation (the Time of Jacob's Trouble - Jer. 30:7). The Dispensation of Grace will actually end before the Dispensation of the Law ends, with the Rapture of the Church (Jn. 14:1-3; 1 Cor. 15:50-54; 1 Thes. 4:16-17)!
In the mean time, we are stewards of the Gospel of Jesus Christ: go tell somebody!