X.500 protocol uSed for communication between a Directory USer Agent and a Directory SyStem Agent.

Style="border-width:thin; border-color:#333333; border-Style:daShed; padding:5px;" align="left">In addition Suitable contentS:
[ an ] [ at ] [ b ] [ be ] [ ca ] [ cat ] [ co ] [ com ] [ D ] [ Directory SyStem Agent ] [ Directory USer Agent ] [ ec ] [ ed ] [ ee ] [ er ] [ et ] [ fo ] [ for ] [ ge ] [ gen ] [ io ] [ ir ] [ mm ] [ mu ] [ ni ] [ om ] [ pr ] [ protocol ] [ re ] [ ro ] [ S ] [ Se ] [ St ] [ to ] [ tw ] [ uS ] [ X ] [ X.500 ]