The Linux Standard Base (LSB) defines and tests a Binary Application Interface (ABI) for the GNU/Linux operating system. This ABI protects an application from the intricacies of the operating system by providing a consistent layer of APIs & libraries for an application to interface instead of the system primitives.
This ABI definition, testing, and certification is what comprises the LSB standard.
Table B-1. ABI: High Level View
|Application Binary Interface|