English ⇄ English Russian +

RFU abbr. stresses
abbr.	РФС (Russian Football Union denghu)
scient.	О.Е.Ф. (относительная единица флуоресценции; relative fluorescent unit Alex Lilo); ОЕФ (относительная единица флуоресценции; relative fluorescent unit Alex Lilo)
English thesaurus
RFU abbr.
abbr.	Relative Fluorescence Units; Reserved For Future Usage; Reference Frequency Unit; Reserved For Future Use
abbr., comp., net., IT	Really Fast Urf
abbr., food.ind.	Reach For Unbleached
abbr., IT	Residence Flag Unilateral
abbr., mil.	Radio Frequency Unit; Ready For Use
abbr., radio, scient.	Reserved for Future Use
abbr., sport.	Rugby Football Union
mil.	ready for use

RFU : 2 phrases in 2 subjects

American usage, not spelling	1
Medical appliances	1