Or
A term in Logic which yields True if any one of a sequence conditions is True, and False if all conditions are False. 
OR 
is denoted 
, 
, or 
. The symbol 
derives from the firstletter of the Latin word ``vel'' meaning ``or.'' The Binary ORoperator has the following Truth Table.
| | |
| F | F | F |
| F | T | T |
| T | F | T |
| T | T | T |
A product of ORs is called a Disjunction and is denoted
Two Binary numbers can have the operation OR performed bitwise. This operation is sometimes denoted 
.
- Director Curve
- Direct Product (Group)
- Direct Product (Matrix)
- Direct Product (Set)
- Direct Product (Tensor)
- Directrix (Conic Section)
- Directrix (Graph)
- Directrix (Ruled Surface)
- Direct Search Factorization
- Direct Sum (Module)
- Dirichlet Beta Function
- Dirichlet Boundary Conditions
- Dirichlet Conditions
- Dirichlet Divisor Problem
- Dirichlet Energy
- Dirichlet Eta Function
- Dirichlet Fourier Series Conditions
- Dirichlet Function
- Dirichlet Integrals
- Dirichlet Kernel
- Dirichlet Lambda Function
- Dirichlet L-Series
- Dirichlet Region
- Dirichlet's Boxing-In Principle
- Dirichlet's Box Principle