The Linux Standard Base (LSB) is a specification that purports to define the services and application-level ABIs that a Linux distribution will provide for use by third-party programs. But some in the Debian project are questioning the value of maintaining LSB compliance—it has become, they say, a considerable amount of work for little measurable benefit.
The LSB was first released in 2001, and was modeled to a degree on the POSIX and Single UNIX Specification standards. Today, the LSB is maintained by a working group at the Linux Foundation. The most recent release was LSB 5.0 in June 2015. It defines five LSB modules (Core, Desktop, Languages, Imaging, and Trial Use).