Example image of eyePlorer eyePlorer map for 'Vertical bar': History of logic Unix Absolute value Interpunct Keyboard layout Microsoft Windows United Kingdom Pipeline (Unix) Table of mathematical symbols X Inequality Norm (mathematics) Set-builder notation Subscript and superscript Colon (punctuation) Cardinality Conditional probability Probability Divisor Logic Sheffer stroke Bra-ket notation Quantum mechanics Restriction (mathematics) Dual space Inner product space Backus–Naur Form Inter-process communication Unix shell Grep DOS Regular expression Bitwise operation Boolean data type Logical disjunction C (programming language) C Sharp (programming language) C++ Java (programming language) Perl Short-circuit evaluation Concatenation Dialect (computing) I SQL String (computer science) Delimiter Flat file database Legal Electronic Data Exchange Standard Pi-calculus