Which device used punched cards for input and output?a. ENIACb. Hollerith Tabulating Machinec. Analytical Engined. Pascaline

To determine which device used punched cards for input and output, let's analyze each option given:

1. ENIAC: The Electronic Numerical Integrator and Computer primarily used vacuum tubes for processing and did not primarily rely on punched cards for input/output, although it could process data from punched cards.

2. Hollerith Tabulating Machine: This device was specifically designed to use punched cards for input to perform calculations and tabulations based on census data.

3. Analytical Engine: Proposed by Charles Babbage, it was designed to use punched cards but was never completed during his lifetime.

4. Pascaline: An early mechanical calculator created by Blaise Pascal, which did not use punched cards.

Final Answer

The correct answer is b. Hollerith Tabulating Machine, as it was specifically designed to use punched cards for both input and output.