Following is a list of resources you will find helpful:
The Yocto Project website: The home site for the Yocto Project.
Intel Corporation: The company who acquired OpenedHand in 2008 and began development on the Yocto Project.
OpenEmbedded: The upstream, generic, embedded distribution used as the basis for the build system in the Yocto Project. Poky derives from and contributes back to the OpenEmbedded project.
BitBake: The tool used to process metadata.
BitBake User Manual:
A comprehensive guide to the BitBake tool.
You can find the BitBake User Manual in the bitbake/doc/manual
directory, which is found in the
Source Directory.
QEMU: An open source machine emulator and virtualizer.