Whatever the case, if you're new to Android -- specifically Android 4.0 -- you may find yourself battling a learning curve that's interfering with your productivity.

Thankfully, there's fast and effective help to be found in the form of the .

This handy reference guide covers all aspects of the operating system, from system navigation to app management to security.

Within each section, you'll find a function ("Customize ringtones, notification sounds and volume levels," for example), a corresponding icon to look for (where applicable), and a brief description of how to perform that function.

Want a printer-friendly version of the guide? Scroll to the bottom of the first page (just before the comments section) and you'll find a tiny Print link.