Question

write any two features of the following :- Mechanical calculating devices 2) Electromechanical calculating devices 3) Electronic computers​

Answer 1

Answer:

There main difference is in power resouces.

Explanation:

Answer 2

Answer:

1. The mechanical calculating devices perform the operation for basic mathematics and done manually as well by its term.
2. The electro-mechanical calculating devices are using power to operate, and the calculations are done by small programs.  
3. The electronic computers run on, and the programs do the calculations after getting the inputs.