Editing Project Xanadu (section)

==Tumbler==

In the design of the Xanadu computer system, a '''tumbler''' is an address of any range of content or link or a set of ranges or links. According to [[Gary Wolf (journalist)|Gary Wolf]] in ''[[Wired (magazine)|Wired]]'', the idea of tumblers was that "the address would not only point the reader to the correct machine, it would also indicate the author of the document, the version of the document, the correct span of bytes, and the links associated with these bytes." Tumblers were created by [[Roger Gregory (programmer)|Roger Gregory]] and [[Mark S. Miller|Mark Miller]].<ref name=WiredCurse /><ref name=nelsonACM>{{Cite journal
 | author = Theodor Holm Nelson
 | title = Xanalogical Structure. Needed Now More than Ever: Parallel Documents, Deep Links to Content, Deep Versioning, and Deep Re-Use
 | url = http://www.cs.brown.edu/memex/ACM_HypertextTestbed/papers/60.html
 | journal = ACM Computing Surveys
 | volume = 31 | issue = 4 | doi = 10.1145/345966.346033
 |date=December 1999
 | pages=33–es| citeseerx = 10.1.1.418.7740
 | s2cid = 12852736
 }}</ref>

The idea behind tumblers comes from [[transfinite number]]s.<ref name=WiredCurse/>