The United States National Spatial Data Infrastructure (NSDI), started in 1994 (see OMB Circular A-16), is considered the earliest geoportal concept.
Circular Quay | OMB | Circular Time | Circular dichroism | Valuev Circular | Specie Circular | South Circular Road | OMB Circular A-16 | OMB Circular A-130 | North Circular Road | Karachi Circular Railway | Circular symmetry | Circular migration | Circular Dichroism | Circular Congregational Church | Circular 10/65 | Argand lamp with circular wick and glass chimney. (Illustration from ''Les Merveilles de la science'' 1867-1869 |
OMB Circular A-130, a circular produced by the U.S. Federal Government to establish policy for executive branch departments and agencies
In February 2007, a controversy arose regarding the capability of aircraft for travel requested by newly elected House Speaker Nancy Pelosi.
The Federal Designated Approving Authority has specific requirements and responsibilities provided by this circular.