This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Although you can legally repeat the same number if the order of load doesn't matter. For example if A and B need to load before C, but the order of A and B is moot, both A and B can be 1, and C can be 2.