Acorn operating systems for the Atom, BBC Micro, Archimedes and later RISC OS machines use the vertical bar character | in place of the caret.
Big O notation | Z notation | Reverse Polish notation | Whyte notation | Robert Caret | Parts-per notation | The final form of Braille's alphabet, according to Henri (1952). The decade diacritics are listed at left, and the supplementary letters are assigned to the appropriate decade at right. Characters are derived by combining the diacritic on the left with the basic letters at top. "(1)" indicates markers for musical and mathematical notation. Parentheses and quotation marks follow English Braille | that book's notation | Siegbahn notation | scientific pitch notation | Reverse Polish Notation | reverse Polish notation | quote notation | Portable Game Notation | Infix notation | abuse of notation | Abstract Syntax Notation One | ABC notation |