A biometric scanner, an electronic device with a sensor to read patterns or images from faces, irises and finger pads to create a biological template or profile
WikiScanner, a tool that provides a searchable database of anonymous Wikipedia edits
In much science fiction, especially older science fiction, the term scanner is used to refer to what is usually now termed a computer monitor.
Other
A personality type described by self-help author Barbara Sher
This disambiguation page lists articles that are about something that can be called Scanner. If an internal link led you here, you may wish to change the link to point directly to the article meant.