The text of the original SICP 2nd edition is licensed by Harold Abelson and Gerald Jay Sussman under a Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA). The text of the JavaScript adaptation is licensed by Harold Abelson, Gerald Jay Sussman, Martin Henz, and Tobias Wrigstad, also under CC BY-SA. The figures in the JavaScript adaptation are derived from figures created b