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.
Inversion of Control (IoC) and Dependency Injection (DI) usually refer to the same thing. IoC is a more general concept (instead of doing X itself, a class relies on some other class to do it) DI is IoC as applied to dependent classes (instead of creating a class that I depend on, it will be passed to me). DI is the most common use of IoC, so usually when they are discussed the terms are used interchangeably.
The Factory Pattern's main concern is creating things - DI's main concern is how things are connected together.
In practice, these two concerns (creating and connecting) are usually related, so most DI/IoC containers do both. You could think of most implementations as very configurable factories - but because the implementations address both concerns - not because the Factory pattern and DI/IoC are the same.
Write once, run anywhere, because there's nowhere to hide! - /. A.C.