 Regarding the origin of the name Boolean algebra, Charles Sanders Peirce (1839–1914) introduced, among several other phrases, the name Boolian algebra for the algebra that resulted from dispensing with the arithmetical scaffolding of Boole’s equational algebra of logic.  With the spelling Boolean algebra this was embraced by his close friend the Harvard philosopher Josiah Royce (1855–1916) around 1900, and then by Royce’s students (including Norbert Wiener, Henry M. Sheffer and Clarence I. Lewis) and in due course by other Harvard professors and the world. It essentially referred to the modern version of the algebra of logic introduced in 1864 by William Stanley Jevons (1835–1882), a version that Boole had rejected in their correspondence—see Section 5.1. For this reason the word Boolean will not be used in this article to describe the algebra of logic that Boole actually created; instead the name Boole’s algebra will be used.  (See the 2015 article “George Boole and Boolean Algebra” by Burris.)