[4] ATutor is also cited in numerous technical reviews and scholarly articles; and many third-party extensions have been developed and distributed for use with the software.

It came in response to two studies conducted by the developer in the years prior that looked at the accessibility of online learning systems to people with disabilities.

Results of the studies showed none of the popular Learning Management Systems at the time even provided minimal conformance with accessibility guidelines.

These features also allow ATutor to adapt to a wide variety of technologies including cell phones, personal data assistants (PDAs), and text-based Web browsers, to name a few.

ATutor is one of three open source learning management systems named in a formal challenge to an e-learning patent issued to Blackboard Inc. in July 2006.

These volunteers collaborated to make a Wikipedia article on the History of virtual learning environments, which documents several examples of prior art.

[18] Additionally, Greg Gay, project lead of ATutor asserted in support of the re-examination request: "A patent on an educational concept -- namely the relationship among students, instructors, and administrators -- makes no sense.