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Current Designations of U.S. Unmanned Military Aerospace Vehicles |
 | | The S-10 slot in the satellite series was reused for unknown reasons. |
| | The "XSS" prefix of the MDS designation has since been used as an acronym with various interpretations ("Experimental Small Satellite", "Experimental Spacecraft System", "Experimental Satellite System"). |
| | Interestingly, the designation of the XSS-11 follow-on program is not an official MDS designator at the time of this writing. |
| www.designation-systems.net /usmilav/missiles.html (3546 words) |
