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  2. List of U.S. security clearance terms - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._security...

    The different organizations in the United States Federal Government use different terminology and lettering. Security clearances can be issued by many United States of America government agencies. The checks for clearances and the granting of clearances is carried out by the US Office of Personnel Management. [1] [2]

  3. United States security clearance - Wikipedia

    en.wikipedia.org/wiki/United_States_security...

    A United States security clearance is an official determination that an individual may access information classified by the United States Government.Security clearances are hierarchical; each level grants the holder access to information in that level and the levels below it.

  4. Security clearance - Wikipedia

    en.wikipedia.org/wiki/Security_clearance

    A United States security clearance is an official determination that an individual may access information classified by the United States Government. Security clearances are hierarchical; each level grants the holder access to information in that level and the levels below it.

  5. Category : Classified information in the United States

    en.wikipedia.org/wiki/Category:Classified...

    Download as PDF; Printable version; ... List of U.S. security clearance terms; Loose lips sink ships; M. MIS-X; N. ... Classified information in the United States.

  6. Single Scope Background Investigation - Wikipedia

    en.wikipedia.org/wiki/Single_Scope_Background...

    A Single Scope Background Investigation (SSBI), now called a Tier 5 (T5) [1] investigation, is a type of United States security clearance investigation. [2] It involves investigators or agents interviewing past employers, coworkers and other individuals associated with the subject of the SSBI.

  7. Q clearance - Wikipedia

    en.wikipedia.org/wiki/Q_clearance

    A Q Clearance is equivalent to a U.S. Department of Defense Top Secret clearance. [2] According to the Department of Energy, "Q access authorization corresponds to the background investigation and administrative determination similar to what is completed by other agencies for a Top Secret National Security Information access clearance." [2]

  8. Sensitive but unclassified - Wikipedia

    en.wikipedia.org/wiki/Sensitive_but_unclassified

    Sensitive Security Information (SSI) is a category of sensitive but unclassified information under the United States government's information sharing and control rules, often used by TSA and CBP. SSI is information obtained in the conduct of security activities whose public disclosure would, in the judgment of specified government agencies ...

  9. L clearance - Wikipedia

    en.wikipedia.org/wiki/L_clearance

    An L clearance is a security clearance used by the United States Department of Energy (DOE) and Nuclear Regulatory Commission for civilian access relating to nuclear materials and information under the Atomic Energy Act of 1954. It is equivalent to a United States Department of Defense (DOD) Secret clearance. [1]