# A-level Computing/OCR/Basic Principles of Hardware, Software and Applications/Machine Level Architecture/Boolean Algebra

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- Boolean Algebra

Boolean Algebra had very little practical use until digital electronics and computers were invented. Digital computers use the binary number system, which has only two stats, 0 and 1. Boolean algebra is ideal for this table

X | MEANING |
---|---|

TRUE | IT IS RAINING TODAY |

FALSE | IT IS NOT RAINING TODAY |

Boolean Equation: An equation that expresses a Boolean's output Q in terms of Boolean inputs X,Y and Z etc.. To which one or more Boolean functions, such as OR, AND and NOT, are applies, more in the Logic gates section.