OER Knowledge CloudBook Chapter2013Cheung, Simon K S.Li, Kam CheongYuen, Kin SunLam, JeanneLi, Kam CheongCheung, Simon K S.Wang, Fu LeeOpen textbookopen licenseopen education resourcesopen coursewareonline open courseshigher educationKnowledge Sharing through TechnologyKnowledge Sharing through Technology8th International Conference on Information and Communication Technology in Teaching and Learning, ICT 2013, Hong Kong, China, July 10-11, 2013, Revised Selected Papers40726 - 34978-3-642-45272-71865-0937Since adopted in early 2000’s, open education resources (OER) have evolved as a major source of learning materials for higher education. In general, there are four categories of OER, namely, open textbooks, open courseware, open online courses, and open-source software and tools to support teaching and learning. This paper attempts to characterize these four categories of OER with representative examples, and elaborates various commonly adopted open licensing options for OER.does not apply10.1007/978-3-642-45272-7_3http://link.springer.com/chapter/10.1007%2F978-3-642-45272-7_3http://link.springer.com/chapter/10.1007%2F978-3-642-45272-7_3Berlin, Heidelberg