STD

STD is an abbreviation used in several different contexts that stand for different terms.

• Sexually transmitted disease
• Subscriber trunk dialling
• Subscriber toll dialling
• State transition diagram
• Internet standard (a subset of the RFCs)
• ISO 4217 currency code for the São Tomé and Principe Dobra
• Doctor of Sacred Theology (see doctorate)

• std.com is an internet service provider based in Boston, Massachusetts.