SDO

SDO may stand for:

Science and Technology

*Scattered Disc Object, an object in the Solar System's Scattered disc.
*Standard Developing Organization, an organization with the scope of establishing national, regional or international engineering standards (e.g on telecommunications, information technology, power generation, quality)
*Social Dominance Orientation, a psychological personality variable.
*Service Data Objects, a computer technology that allows heterogeneous data to be accessed in a uniform way.
*Solar Dynamics Observatory, a NASA project to study the working of the sun.
*Selective Door Operation, the ability to electronically disable one or more set of doors on public transportation or office buildings.

Video Games
*Silent Death Online, a video game developed by Mythic Entertainment.

Other
*Hong Kong Stamp Duty Ordinance
*San Diego Opera, an opera company located in the city of San Diego, California