A device which uses optics to detect printed data (such as a barcode).
One who scans.
A radio receiver which iterates through a sequence of frequencies to detect signal.
A device which scans documents in order to convert them to a digital medium.
A device which uses radiation (ultrasound, X-ray, etc.) to generate images of tissue or surfaces for diagnostic purposes.
An electronic device for recording video signals, for example onto magnetic tape or videodisks.