The astrolabe is an ancient instrument used to measure the altitude of celestial bodies, such as the sun and stars, above the horizon. It was used in astronomy, navigation, and surveying.

A compass is a navigational instrument that indicates the direction of magnetic north. It is used for orientation and navigation.

A ruler is a flat, straight instrument with markings used for measuring and drawing straight lines.

A protractor is a semicircular instrument used for measuring angles in degrees.

A compass is a drawing instrument used for drawing circles and arcs. It consists of two legs, one with a sharp point and the other with a pencil or pen.

A set square is a triangular instrument used for drawing perpendicular and parallel lines.

A calculator is an electronic device used for performing mathematical calculations.

An abacus is an ancient calculating tool used for performing arithmetic operations, such as addition, subtraction, multiplication, and division.

A slide rule is a mechanical calculating tool used for performing mathematical operations, such as multiplication, division, and logarithms.

A computer is a powerful tool used for performing complex mathematical operations, such as solving equations, analyzing data, and creating simulations.

A clock is a device used for measuring and displaying time.

A stopwatch is a portable timekeeping device used for measuring time intervals.

A spreadsheet is a computer program that allows users to enter, organize, and manipulate data in a tabular format.

A graphing calculator is a specialized calculator that allows users to graph functions and equations.

A meter is a device used for measuring and displaying physical quantities, such as length, mass, and temperature.