Unicode中的數學運算符與符號(英语:Mathematical operators and symbols in Unicode) Unicode符號 媒體控制符號(英语:Mediacontrolsymbols) Unicode 1.0.1 Addendum (PDF). The Unicode Standard
Newell, Allen and Herbert A. Simon. Computer Science as Empirical Inquiry: Symbols and Search (PDF). Communications of the ACM. March 1976, 19 (3) [2006-12-21]
Movement. Columbia University Professor Warns Students of Jewish Control Over Mainstream Media. StopAntisemitism(英语:StopAntisemitism). Columbia University
a convention in PicoLisp to use transient symbols (instead of internal symbols) or private internal symbols …… But with dynamic binding I cannot implement