▁directories : ▁▁ ▁Authentication ▁and ▁contacts ▁▁ ▁Microsoft ▁Active ▁Directory ▁▁ ▁L D AP v 3 , ▁including ▁an ▁Open ▁Directory ▁domain ▁or ▁R FC ▁ 2 3 0 7 - comp li ant ▁system ▁▁ ▁Apple / Ne XT ▁Net Info ▁domains ▁▁ ▁B SD ▁flat ▁files ▁and ▁N IS ▁ ▁Service ▁discovery ▁and ▁name ▁resolution ▁ ▁Apple T alk ▁ ▁Windows ▁( Net BI OS ▁and ▁W IN S ) ▁ ▁Service ▁Location ▁Pro tocol ▁( SL P ) ▁ ▁Mult ic ast ▁DNS ▁( B on j our / Zero conf ) ▁ ▁History ▁Open ▁Directory ▁began ▁with ▁Mac ▁OS ▁X ▁Server ▁ 1 0 . 2 . ▁In ▁this ▁initial ▁form , ▁Open ▁Directory ▁consisted ▁of ▁a ▁network - visible ▁Net Info ▁directory ▁domain ▁and ▁a ▁corresponding ▁Authentication ▁Manager ▁service ▁for ▁storing ▁passwords ▁outside ▁of ▁the ▁directory . ▁ ▁Version ▁ 1 0 . 2 ▁also ▁included ▁support ▁for ▁Ker ber os . ▁ ▁Mac ▁OS ▁X ▁versions ▁ 1 0 . 1 ▁and ▁ 1 0 . 0 ▁stored ▁user ▁password ▁information ▁within ▁the ▁directory ▁domain ▁using ▁crypt ▁password ▁authentication ▁authorities , ▁but ▁version ▁ 1 0 . 2 ▁p aved ▁the ▁way ▁for ▁the ▁current ▁Sh adow ▁Hash ▁and ▁Password ▁Server ▁mechan isms . ▁ ▁Password ▁Server ▁is ▁the ▁successor ▁to ▁Authentication ▁Manager , ▁and ▁was ▁introduced ▁in ▁Open ▁Directory ▁ 2 ▁in ▁Mac ▁OS ▁X ▁Server ▁ 1 0 . 3 . ▁ ▁Open ▁Directory ▁ 2 ▁was ▁also ▁the ▁first ▁version ▁to ▁use ▁L D