An "Open Course" refers to a type of educational program that is freely accessible to anyone interested in learning. These courses are often offered online and cover a wide range of subjects, allowing learners to study at their own pace. They can include video lectures, reading materials, and interactive assignments, making education more inclusive and flexible. Many universities and organizations provide open courses as part of the Open Educational Resources movement, which aims to promote knowledge sharing. Popular platforms for open courses include Coursera, edX, and Khan Academy, where learners can access high-quality content without any cost.