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  2. Return merchandise authorization - Wikipedia

    en.wikipedia.org/wiki/Return_merchandise...

    A return merchandise authorization (RMA), return authorization (RA) or return goods authorization (RGA) is a part of the process of returning a product to receive a refund, replacement, or repair to which buyer and seller agree during the product's warranty period.

  3. Route availability - Wikipedia

    en.wikipedia.org/wiki/Route_availability

    Route Availability (RA) is the system by which the permanent way and supporting works (bridges, embankments, etc.) of the railway network of Great Britain are graded. All routes are allocated an RA number between 1 and 10. Rolling stock is also allocated an RA (again between 1 and 10) and the RA of a train is the highest RA of any of its ...

  4. Resettlement Administration - Wikipedia

    en.wikipedia.org/wiki/Resettlement_Administration

    The Resettlement Administration (RA) was a New Deal U.S. federal agency created May 1, 1935. [1] It relocated struggling urban and rural families to communities planned by the federal government. On September 1, 1937, it was succeeded by the Farm Security Administration .

  5. Registration authority - Wikipedia

    en.wikipedia.org/wiki/Registration_authority

    Frequently, facilitating the implementation of an ISO standard's requirements is best suited, by its nature, to one entity, an RA. This, de facto, creates a monopoly situation and this is why care needs to be taken with respect to the functions carried out and the fees charged to avoid an abuse of such a situation. [ 1 ]

  6. Right ascension - Wikipedia

    en.wikipedia.org/wiki/Right_ascension

    Right ascension (abbreviated RA; symbol α) is the angular distance of a particular point measured eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point in question above the Earth. [1]

  7. Regulatory affairs - Wikipedia

    en.wikipedia.org/wiki/Regulatory_affairs

    Regulatory affairs (RA), is a profession that deals with an organization’s adherence to regulatory compliance.. It is a position mostly found within regulated industries, such as pharmaceuticals, medical devices, cosmetics, agrochemicals (plant protection products and fertilizers), energy, banking, telecom etc. Regulatory affairs also has a very specific meaning within the healthcare ...

  8. Resident assistant - Wikipedia

    en.wikipedia.org/wiki/Resident_assistant

    A resident assistant (RA), also known by a variety of other names, [note 1] is a trained peer leader who coordinates activities in residence halls in colleges and universities, mental health and substance abuse residential facilities, [1] or similar establishments.

  9. Surface roughness - Wikipedia

    en.wikipedia.org/wiki/Surface_roughness

    S m is the mean spacing between peaks. Just as with real mountains it is important to define a "peak". For S m the surface must have dipped below the mean surface before rising again to a new peak. The average wavelength a and the root mean square wavelength q are derived from a.