The first calculating device is the? by Sunday | Jan 20 | Computer Studies WAEC | 0 comments A. Abacus B. Census machine C. Difference engine D. Napier bones. Correct Answer: Option A – Abacus Users Also Read These:Which of the following factors is not considered…In calculating the total cost of a menu; it is…AGE 114 Theory Questions: Motion and Calculating…The formula for calculating price elasticity of…An electrical device has 50 turns in its primary…