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  2. Air Force Specialty Code - Wikipedia

    en.wikipedia.org/wiki/Air_Force_Specialty_Code

    Air Force Specialty Code. The Air Force Specialty Code (AFSC) is an alphanumeric code used by the United States Air Force to identify a specific job. Officer AFSCs consist of four characters and enlisted AFSCs consist of five characters. A letter prefix or suffix may be used with an AFSC when more specific identification of position ...

  3. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. 497 HTTP Request Sent to HTTPS Port. An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. 499 Client Closed Request.

  4. ERRC - Wikipedia

    en.wikipedia.org/wiki/ERRC

    ERRC may refer to: Early Rain Reformed Church. European Roma Rights Centre. FIA E-Rally Regularity Cup. Expendability, Recoverability, Repairability Category as defined in AFMCI 23-101 of the United States Air Force. Category:

  5. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    Low-density parity-check (LDPC) codes are a class of highly efficient linear block codes made from many single parity check (SPC) codes. They can provide performance very close to the channel capacity (the theoretical maximum) using an iterated soft-decision decoding approach, at linear time complexity in terms of their block length.

  6. Multiservice tactical brevity code - Wikipedia

    en.wikipedia.org/wiki/Multiservice_tactical...

    Using the codes eases coordination and improves understanding during multiservice operations. The codes are intended for use by air, ground, sea, and space operations personnel at the tactical level. Code words that are followed by an asterisk (*) may differ in meaning from NATO usage. There is a key provided below to describe what personnel ...

  7. U.S. Air Force Emergency Management - Wikipedia

    en.wikipedia.org/wiki/U.S._Air_Force_Emergency...

    The Emergency Management (EM) career field is the United States Air Force's (USAF) primary organization responsible for implementing an installation-level EM program. . Emergency Managers, also known by the Air Force Specialty Code (AFSC) 3E9X1, are the Air Force's subject matter experts for all non-medical Chemical, Biological, Radiological and Nuclear passive defense and consequence management m

  8. Enlisted Performance Report - Wikipedia

    en.wikipedia.org/wiki/Enlisted_Performance_Report

    An Enlisted Performance Report (EPR) is an evaluation form used by the United States Air Force. Instructions for constructing an EPR appear in chapter 3 of Air Force Instruction 36-2406: Officer and Enlisted Evaluation Systems. The EPR replaced the Airman Performance Report (APR) in the late 1980s.

  9. United States Air Force enlisted rank insignia - Wikipedia

    en.wikipedia.org/wiki/United_States_Air_Force...

    On 20 September 2021, the United States Space Force released several media graphics depicting the new rank insignia for enlisted personnel. The information sheets described the designs for the enlisted ranks took inspiration from Vandenberg's proposals from 1952, noted as "Vandenberg Stripes". 1952 proposed rank insignia for E4–E2.