What are the differences between unlocking and jailbreaking?

iPad jailbreaking is a process that allows iPad, iPhone, iPod touch guys to download, install and launch any 3rd party applications on their iPads even if these apps is not available through Apple's App Store. Certainly, the Apps from Apple's official App Store is also accessible via jailbroken iPads. What's more, a jailbroken iPad will be allowed to change its looks, customize various settings, etc. You are still able to run and upgrade apps downloaded and purchased from the App Store. Are you not satisfied with the jailbreaking result? Just restore your iPad via iTunes easily.

Unlocking refers to the process that enables the devices to accept any SIM-card from any carrier in any country. For example, you can avoid AT&T activation fee and data plan legally if you use an unlocked iPhone.