The UV-5R is an inexpensive Chinese made VHF/UHF amateur hand held transceiver.

The Chinese Radio Documentation project has produced a free (open source) high-quality user guide for the Baofeng UV-5R radio.  This user guide is a "real manual," and is much more expansive than the minimal guide that is provided by the manufacturer.  It explains all the menu and other functions in some detail.

W7APK has created a helpful UV-5R Cheat Sheet that includes a step-by-step recipe for manually programming repeaters into the radio.