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This work originally came from a National Reconnaissance Office (NRO) website or publication and has been specifically released into the public domain in the United States. Unless specifically released, NRO information should be assumed to be classified. The NRO seal is usage-restricted.
The numero sign or numero symbol, № (also represented as Nº, No̱, №, No., or no.), [1] [2] is a typographic abbreviation of the word number(s) indicating ordinal numeration, especially in names and titles. For example, using the numero sign, the written long-form of the address "Number 29 Acacia Road" is shortened to "№ 29 Acacia Rd ...
The National Reconnaissance Office (NRO) is a member of the United States Intelligence Community and an agency of the United States Department of Defense which designs, builds, launches, and operates the reconnaissance satellites of the U.S. federal government.
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The National Reconnaissance Office logo This is a list of NRO Launch ( NROL ) designations for satellites operated by the United States National Reconnaissance Office . Those missions are generally classified, so that their exact purposes and orbital elements are not published.
Hazard symbols; List of mathematical constants (typically letters and compound symbols) Glossary of mathematical symbols; List of physical constants (typically letters and compound symbols) List of common physics notations (typically letters used as variable names in equations) Rod of Asclepius / Caduceus as a symbol of medicine