reiknivél
Reiknivél is the Icelandic word for calculator. It refers to a device or computer program that performs arithmetic and other mathematical operations. Basic calculators are designed for simple calculations like addition, subtraction, multiplication, and division. More advanced scientific and graphing calculators offer functions for trigonometry, logarithms, statistics, and the ability to plot graphs of equations.
The development of electronic calculators began in the mid-20th century, leading to smaller and more portable