ADL is a standards body that began as a joint project of the US Department of Defense and the Department of Labor, and with industry participation. You may know ADL as the organization that brought us the SCORM standard.
SCORM, which is an acronym for Sharable Content Object Reference Model, is a standard specification for publishing, launching, and tracking eLearning and it remains a dominant standard in the eLearning industry. Essentially, SCORM-compliant eLearning courses can interoperate with any learning management system that also supports SCORM.
First published in 2000, they updated SCORM several times over the next decade. Many eLearning authoring tools and LMS products support the SCORM standard.
Since 2009, not much has happened with SCORM, which they designed for use with traditional eLearning design. SCORM is ill equipped to handle non-traditional learning that is informal, social, and mobile.