Which civilization used a quipu as method of calculation?

The civilization that used the quipu as a method of calculation was the Inca.

The quipu was a complex system of knotted strings used by the Inca for recording numerical data, accounting, and even storytelling. The different colors, knots, and their positions on the strings represented different numerical values. While it wasn't a written language, it was an incredibly sophisticated system for recording and communicating information.