Description: Abacus is an ancient calculating tool used for basic arithmetic. It consists of beads or stones that slide on rods or in grooves, allowing quick mental calculation.
Type: software
Description: Windows Calculator is a simple calculator app included in Windows operating systems. It provides basic arithmetic functions like addition, subtraction, multiplication, division, as well as scientific functions like sine, cosine, logarithms, etc.
Type: software
Pricing: Free