Discussion
Which are the input devices that enable direct data entry into a computer system from source documents?
Answer: A
Correct answer: Data Scanning devices
Data scanning devices read the source document itself, so the data never has to be transcribed - optical mark readers, optical character readers, bar code readers and magnetic ink character readers all belong to the class.
The gain is accuracy as much as speed: manual keying introduces errors at a rate that matters when the volume is large, and reading the original removes that step entirely. The other three options are not established categories.
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