text: STD is an abbreviation used in several different contexts that stand for different terms. It most commonly means :\n* Sexually Transmitted Disease (also, Sexually Transmissible Disease) \nAlso:\n* Doctor of Sacred Theology\n* Salinity Temperature Depth \n* São Tomé and Príncipe dobra, the ISO 4217 code for the currency of São Tomé and Príncipe \n* Short Term Disability \n* Software Test Documentation\n* State transition diagram \n* Subscriber trunk dialling \n* Subscriber toll dialling \n...Which one of these abbreviations do you want the opposite(s) for ?!