Gives 151 terms in French, English, Russian, German, Spanish, Italian, Dutch, Polish, Swedish with their definitions in French, English and Russian subdivided into the following sections: general terms (15), terms relating to energization (input and auxiliary) (14), terms relating to conditions and operation of a relay (29), terms relating to influencing quantities or factors (9), terms relating to measuring relays (17), terms relating to output of the relays (with or without contact) (28), terms relating to times (26), terms relating to accuracy applicable to a given relay (measuring relay and specified-time relay) (13). Terms are ordered by topics, indices in the above languages give the terms in alphabetic order.