"Open Educational Resources (OER) are learning, teaching, and research materials in any format and medium that reside in the public domain or are under copyright that has been released under an open license, that permits no-cost access, re-use, re-purpose, adaptation, and redistribution by others" - UNESCO 

• Creative Commons: "is a nonprofit organization that helps overcome legal obstacles to the sharing of knowledge and creativity to address the world’s pressing challenges" (Creative Commons). 
• Embargo Periods: is a set period of time where content is blocked behind a paywall before becoming accessible without paying or being a subscriber.
• FAIR data or FAIR/O data: FAIR/O stands for findability, accessibility, interoperability, and reusability. When the O is included, the data set is under an open-access license. 
• Gold Open Access (Gold OA): is where a publisher makes all content available for free immediately on their website.
• Hybrid Open Acess: Hybrid access is where a journal hosts both open access and copyrighted materials. 
• Massive Open Online Course or OpenCourseWare: Free online courses that are typically published by universities but there are a few companies branching into this category such as Coursera, Khan Academy, or Saylor Academy. These courses may or may not be available for remixing or sharing.
• Open Access: Open access is the broad umbrella term that refers to media (textbooks, journals, music, movies, software, etc.) that is free of charge and may have the ability to allow others to revise, remix, and redistribute the media.
• Open Source: Open source refers to software where the source code is available for others to inspect, modify, and enhance.
• Shadow library: an online database that hosts illegal access to paid content. 
• Z-Degree: a college program that does not require students to spend money on materials.