To understand means to simplify. (RussianПонять - значит упростить) [From Strugatsky's SFnovelВолны гасят ветер (Waves blow out the wind, translated to English as The Time Wanderers)]
... Security Service[?]
Finland
Suojelupoliisi[?] (SuPo)
France
Défense et Sécurité du Territoire (DST)
Deuxieme Bureau[?] (Defunct)
Direction Générale de la ...