The SNOMED International Web site (http://www.snomed.org). This Web site is the home of the SNOMED International organization, which developed and maintains the SNOMED-CT vocabulary.
The LOINC Web site (http://www.regenstrief.org/loinc). This Web site is the location where you can download the latest version of LOINC.
The Health Level Seven Web site (http://www.hl7.org). This Web site is the home of Health Level Seven, Inc., and describes the various standards-developing efforts of that organization.
The GS1 Web site (http://www.gs1.org). This Web site is the home of GS1,the organization that oversees the Global Trade Item Number standard.
The National Drug Code Directory (http://www.fda.gov/ cder/ndc). This Web site is where you can download the latest version of the National Drug Code Directory.
The RxNorm Web site (http://www.nlm.nih.gov/research/umls/ rxnorm_main.html). This Web site provides information about the RxNorm vocabulary. You can also download a program that enables you to browse and search RxNorm from this site.
The UMLS Web site (http://www.nlm.nih.gov/research/umls). This site provides information about the UMLS. To download the UMLS, you must first register (registration is free).
The Federal Information Processing Standards Web site (http://www.itl.nist.gov/fipspubs/). This site describes various Federal Information Processing Standards. You can download FIPS 5-2, FIPS 6-4, and FIPS 10-4 (described in the text) from this site.
The Web site for ISO 3166 (http://www.iso.org/iso/en/prods-services/iso3166ma/index.html). This site describes ISO 3166 and is also the place to download the two-character country codes that are part of ISO 3166-1 and purchase the remainder of the ISO 3166 standards.
The National Oceanic and Atmospheric Administration's Web site about METAR (http://metar.noaa.gov/). This site describes the METAR standard. You can find Federal Meteorological Handbook No. 1 (discussed in the text) here.
The Accredited Standards Committee X12 Web site (http://www.x12.org/). This is the official Web site of the ASC X12 organization, where you can find more information about ASC X12 standards.
The National Council on Prescription Drug Programs Web site (http://www.ncpdp.org/). This is the official Web site of the National Council on Prescription Drug Programs (NCPDP), where you can find more information about NCPDP standards.
The Public Health Information Network Web site (http://www.cdc.gov/phin). This Web site describes the Public Health Information Network effort and the standards it recommends.
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