This document provides an overview of learning management systems (LMS). It defines an LMS as software for delivering, tracking, and managing training. It notes that most LMS are web-based to enable learning anywhere and anytime. It then describes some key features of LMS including disseminating content, enabling communication, assessing performance, and incorporating new technologies. The document provides examples of commercial, open source, and proprietary LMS platforms. It highlights key course management and learner management features of LMS and how they can be used to create online courses and manage learners. Finally, it discusses how LMS can be used to address different collaboration and learning challenges.