Various acronyms such as (all of which represent the same order of precedence):

**PEMDAS**- Parentheses Exponents Multiplication Division Addition Subtraction Also remembered using the sentence - "Please Excuse My Dear Aunt Sally"

**BEDMAS**- Brackets Exponents Division Multiplication Addition Subtraction

**BIDMAS**- Brackets Indices Division Multiplication Addition Subtraction

**BIMDAS**- Brackets Indices Multiplication Division Addition Subtraction

**BIODMAS**- Brackets Indices Of Division Multiplication Addition Subtraction

**BODMAS**- Brackets Of Division Multiplication Addition Subtraction

**BOMDAS**- Brackets Of Multiplication Division Addition Subtraction

**BPODMAS**- Brackets Power Of Division Multiplication Addition Subtraction

The Microsoft calculator program uses the order of operations in the scientific mode but ignored it in the standard mode. The Google calculator adheres to the order of preference strictly as can be see in the result of 6*3/4^2*3+2*(3/6-4)*3^(2-4).

Humans require the order of operations as we use conventional infix notation. However, the computers use a postfix notation like Reverse Polish notation , which obviates the need for the order of operations. Few computer languages use a prefix notation, which does not require the order of precedence as well. So should humans try to move from the infix to postfix or prefix notation?

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