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:The first calculating machine in data processing was?The formula for calculating price elasticity of…In calculating the total cost of a menu; it is…In calculating mean one should?SS1 Second Term Further Mathematics Lesson Note –…