- Shapiro, R. B. and M. Ahrens (2016). "Beyond blocks: syntax and semantics." Commun. ACM 59(5): 39-41. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in Communications of the ACM, Volume 59 Issue 5, May 2016, doi: 10.1145/2903751.