This page contains information about the HP Chromebook 11 that is interesting and/or useful to software developers. For general information about getting started with developing on Chromium OS (the open-source version of the software on the Chrome Notebook), see the Chromium OS Developer Guide.
Caution: Modifications you make to the system are not supported by Google, may cause hardware, software or security issues and may void warranty.
Details for working with developer mode can be found on this page.
There is also firmware in a custom embedded controller (which handles things like the keyboard), but we won't cover that here as you generally should not need to modify that. You can find the source in the ChromiumOS ec git tree (in the spring firmware branch).