The correct answer is: A. To reduce the no.of operator errors in recording data
An offline device is a device that is not connected to a computer. This means that data can be recorded on the device without the need for a computer. This can help to reduce the number of operator errors in recording data, as the data is not entered directly into a computer.
Option B is incorrect because offline devices do not save computer time. In fact, they can sometimes take longer to use than online devices, as the data needs to be transferred to a computer before it can be used.
Option C is incorrect because offline devices do not save floor space in the computer center. In fact, they can sometimes take up more space than online devices, as they need to be stored separately from the computer.
Option D is incorrect because only option A is correct.
Option E is incorrect because option A is correct.