Initialism of right foot. / (photography) Initialism of range finder. / (electronics, physics) Initialism of radio frequency. / (pathology) Initialism of rheumatoid factor.

Initialism of Russian Federation.

(US, military, aviation) reconnaissance fighter; an unarmed fighter modified for photo-reconnaissance (prefix)

Initialism of radio frequency.

(Australia) Initialism of Rural Fire Service. (a volunteer organisation used to augment the regular service.)

plural of RF

Initialism of Royal Flying Doctor Service of Australia.

(electronics) Initialism of radio-frequency identification.

An electronic chip used to tag an object or merchandise in order to recognize it electronically from a short distance.

(business) Initialism of request for proposal. / (law) Initialism of request for production.