Stephen Downes is a specialist in online learning technology and new media. He is a leading voice in online and networked learning. He speaks from practical experience both as a college and university teacher and the author of learning management and content syndication software. Through a 25-year career in the field, Downes has developed and deployed a series of progressively more innovative technologies, beginning with multi-user domains (MUDs) in the 1990s, open online communities in the 2000s, and personal learning environments in the 2010s. Downes is perhaps best known for his daily newsletter, OLDaily, which is distributed by web, email, and RSS to thousands of subscribers around the world. As a teacher and designer, he is also known as the originator of the Massive Open Online Course (MOOC).