At Any Rate

after-action report

After action report, a player's recount of a game. Found on a dedicated board

Association of American Railroads

Annual Aid Review

Association of American Railroads. US body for determination of railway engineering standards, equivalent to the European UIC

Allen Aircraft and Radio

The central coordinating and research agency of the American railway industry. This agency deals with matters of common concern in the whole field of railroading from operations to public relations.

American Association of Rail Roads

Abbreviation for:- Against All Risks (insurance clause). - Association of American Railroads.

Against all risks.

(n) a river in north central Switzerland that runs northeast into the Rhine

Against All Risks (insurance clause). Association of AmericanRailroads.

  At Any Rate

Association of American Railroads

Airport Acceptance Rate or Airport Arrival Rate. The number of arrivals an airport is capable of accepting each hour.

A transcript of academic achievement of students who have completed a minimum, recommended, advanced (distinguished) or foundation high school program. School districts are required to maintain these [..]

Air-to-Air Refueling.

The phenomenon, occurring in vitro or in vivo, of antibody combining with antigen of the type that stimulated the formation of the antibody, thereby resulting in agglutination, precipitation, complement fixation, greater susceptibility to ingestion and destruction by phagocytes, or neutralization of exotoxin. See: skin test. Acronym: AAR (05 Mar 20 [..]

Air-to-Air Refuelling

Air-to-Air Refueling.

After action reviews

ear (of corn, grain etc.)

Acronym for "Airport Acceptance Rate." The AAR is the number of arrivals an airport is capable of accepting each hour. The AAR can vary depending on weather, construction, equipment outages, etc.