SDO

SDO may stand for:

In science and technology:

• Scattered disc object, an object in the Solar System's scattered disc
• Selective Door Operation, a technology that disables individual sets of doors on transit vehicles or buildings
• Serial Data Output, in digital electronics
• Service Data Object protocol, a sub-protocol under the CANopen protocol
• Service Data Objects, a computer technology that allows heterogeneous data to be accessed in a uniform way
• Signed Data Object, the resulting data object from a digital signature
• social dominance orientation, a psychological personality variable
• Solar Dynamics Observatory, a NASA mission to study the Sun
• Spatial Data Option, a previously used name for Oracle Spatial
• Standards Developing Organization, an organization that creates engineering standards
• Subdwarf O star (SdO)

Other uses:

• San Diego Opera, an opera company located in the city of San Diego, California
• Silent Death Online, a video game developed by Mythic Entertainment
• Stamp Duty Ordinance, a special stamp duty in Hong Kong to curb property speculation
• Super Dimension Orguss, an anime series