RFID is an acronym for

RFID expands to Radio Frequency Identification, a technology that uses radio waves to identify tagged objects automatically.

Roaming relates to mobile network coverage, so it does not fit the R here.

Runtime concerns program execution, which is unrelated to wireless identification.

Remote sounds plausible, but the accepted term uses Radio for the wave based method.

An RFID system pairs a tag holding data with a reader that powers and queries it.

It is widely used in access cards, toll tags and inventory tracking.