## In obsolete|lang=en terms the difference between abacus and calculator

is that

**abacus** is (obsolete) a table or tray strewn with sand, anciently used for drawing, calculating, etc while

**calculator** is (obsolete) a set of mathematical tables.

## As nouns the difference between **abacus** and **calculator**

is that

**abacus** is (obsolete) a table or tray strewn with sand, anciently used for drawing, calculating, etc while

**calculator** is a mechanical or electronic device that performs mathematical calculations.