Editing Scheme (programming language) (section)

===Origins===
Scheme started in the 1970s as an attempt to understand [[Carl Hewitt]]'s [[Actor model]], for which purpose Steele and Sussman wrote a "tiny Lisp interpreter" using [[Maclisp]] and then "added mechanisms for creating actors and sending messages".<ref name="revisited">{{Cite journal |last1=Sussman |first1=Gerald Jay |last2=Steele |first2=Guy L. |date=1 December 1998 |title=The First Report on Scheme Revisited |journal=Higher-Order and Symbolic Computation |volume=11 |issue=4 |pages=399–404 |doi=10.1023/A:1010079421970 |s2cid=7704398}}</ref>  Scheme was originally called "Schemer", in the tradition of other [[Lisp (programming language)|Lisp]]-derived languages such as [[Planner (programming language)|Planner]] or ''Conniver''. The current name resulted from the authors' use of the [[Incompatible Timesharing System|ITS operating system]], which limited filenames to two components of at most six characters each. Currently, "Schemer" is commonly used to refer to a Scheme programmer.