1. The document discusses the history and concepts of technology-enhanced learning (TEL) and e-learning.
2. It traces the origins of TEL to programmed learning and teaching machines developed by B.F. Skinner in the 1920s and their growth through computer-based learning programs in the 1960s and internet-based learning in the 1990s.
3. The document also characterizes different types of TEL and e-learning, emphasizing that TEL can occur in various formats including online, blended, and asynchronous learning using different technologies.