The document discusses different types of learning environments and systems that support online education. It defines a learning environment as any setting where learning takes place, including virtual environments. A virtual learning environment (VLE) is an online system that provides access to classes, content, and other educational resources. Learning management systems (LMS) are software that administer, track, and deliver educational courses, while learning content management systems (LCMS) focus specifically on developing and managing educational content for delivery through an LMS. Content management systems (CMS) are applications that allow publishing, editing, and organizing digital content.