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  2. United States vehicle emission standards - Wikipedia

    en.wikipedia.org/wiki/United_States_vehicle...

    The Tier I standard was adopted in 1991 and was phased in from 1994 to 1997. Tier II standards were phased in from 2004 to 2009. Within the Tier II ranking, there is a subranking ranging from BIN 1–10, with 1 being the cleanest (Zero Emission vehicle) and 10 being the dirtiest.

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

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

    T3 or T3R - Tier 3 or Tier 3 Reinvestigation, now replace all NACLC. T5 and T5R - Tier 5 or Tier 5 Reinvestigation, now replace SSBI and SBPR respectively. Yankee White – An investigation required for personnel working with the President and Vice President of the United States. Obtaining such clearance requires, in part, an SSBI.

  4. Top 100 Contractors of the U.S. federal government - Wikipedia

    en.wikipedia.org/wiki/Top_100_Contractors_of_the...

    With $48.666 billion in business with the U.S. federal government, Lockheed Martin, based in Bethesda, Maryland, is the largest U.S. federal government contractor. The Top 100 Contractors Report (TCR 100) is a list developed annually by the General Services Administration as part of its tracking of U.S. federal government procurement.

  5. Senior Executive Service (United States) - Wikipedia

    en.wikipedia.org/wiki/Senior_Executive_Service...

    Senior level employees of several agencies are exempt from the SES but have their own senior executive positions; these include the Federal Bureau of Investigation, Central Intelligence Agency, Defense Intelligence Agency, National Security Agency, Transportation Security Administration, Federal Aviation Administration, Government ...

  6. Intelligence Support Activity - Wikipedia

    en.wikipedia.org/wiki/Intelligence_Support_Activity

    The Intelligence Support Activity (ISA), also known at various times as Mission Support Activity (MSA), Office of Military Support (OMS), Field Operations Group (FOG), Studies and Analysis Activity (SAA), Tactical Concept Activity, Tactical Support Team, Tactical Coordination Detachment, [1] and also nicknamed "The Activity" and the "Army of Northern Virginia", [2] is a United States Army ...

  7. List of Veterans Affairs medical facilities - Wikipedia

    en.wikipedia.org/wiki/List_of_Veterans_Affairs...

    Veterans' health care in the United States is separated geographically into 19 regions (numbered 1, 2, 4–10, 12 and 15–23) [1] known as VISNs, or Veterans Integrated Service Networks, into systems within each network headed by medical centers, and hierarchically within each system by division level of care or type.

  8. Tier 4 - Wikipedia

    en.wikipedia.org/wiki/Tier_4

    Tier 4 or Tier four may refer to: Tier 4 COVID restrictions in England under The Health Protection (Coronavirus, Restrictions) (All Tiers) (England) Regulations 2020 , the highest level Level 4 COVID restrictions, in COVID-19 pandemic in Scotland

  9. Executive Schedule - Wikipedia

    en.wikipedia.org/wiki/Executive_Schedule

    Executive Schedule (5 U.S.C. §§ 5311–5318) is the system of salaries given to the highest-ranked appointed officials in the executive branch of the U.S. government. . The president of the United States appoints individuals to these positions, most with the advice and consent of the United States Sena