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The first Eighth Air Force aircraft to receive unit markings were the Spitfires of the 4th and 31st Fighter Groups training with RAF Fighter Command in September 1942. The markings were two-letter fuselage squadron codes located on one side of the national insignia and a single letter aircraft code on the other side.
Two previous USAF/AAF/AAC number series are included due to their impact and partial incorporation into the tri-service system (A, B, C, F and O reset to one, but # carryover existed). The United States department of Defense was established in 1949, the old name Department of War was retired in 1947.
C/D: Cup–disc ratio CF: Count fingers vision – state distance c/o or c.o. Complains of CT: Cover test c/u: Check up CW: Close work Δ: Prism dioptre D: Dioptres DC: Dioptres cylinder DNA: Did not attend DOB: Date of birth DS: Dioptres sphere DV: Distance vision DVD: Dissociated vertical deviation EF: Eccentric fixation FB: Foreign body FD ...
f: finish: An italic f (Latin small letter f) written on a line representing a surface was an old way of indicating that the surface was to be machined rather than left in the as-cast or as-forged state. The "f" came from "finish" in the sense of "machine finish" as opposed to raw stock/casting/forging.
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s.t. – such that or so that or subject to. st – standard part function. STP – [it is] sufficient to prove. SU – special unitary group. sup – supremum of a set. [1] (Also written as lub, which stands for least upper bound.) supp – support of a function. swish – swish function, an activation function in data analysis.
Its chief original mission was to fix the many glitches and digital problems that plagued the rollout of HealthCare.gov, the site associated with Obama's signature health care law, which Trump has spent most of his political career bashing. Here's a look at what becoming part of the government might mean for DOGE: A vow to cut billions of dollars
U.T.F. (Undead Task Force), an American comic book title Underground Test Facility , used for testing and developing enhanced oil recovery technology in northern Canada Unión del Trabajo de Filipinas , in the Philippines