ISO/IEC 17025 with other accreditation standards of the ISO 17000 series (and unlike most ISO standards for management systems), third party auditing ("assessment") of the laboratory is normally carried out by the national organization responsible for accreditation. Laboratories are therefore "accredited" under ISO/IEC 17025, rather than "certified" or "registered" (c.f. ISO 9000 series). In short, "accreditation" differs from "certification" by adding the concept of a third party (Accreditation Body (AB)) attesting to technical competence within a laboratory in addition to its adherence and operation under a documented quality system, specific to a Scope of Accreditation. In order for accreditation bodies to recognize
Symbols and conventions used in welding documentation addition to the symbols, the following abbreviations are commonly used in North America: Symbols and conventions used in welding documentation The symbols and conventions used in welding documentation are specified in national and international standards such as ISO 2553 "Welded, brazed and soldered joints -- Symbolic representation on drawings" and ISO 4063 "Welding and allied processes -- Nomenclature of processes and reference numbers". The US standard symbols are outlined by the American National Standards Institute and the American Welding Society and are noted as "ANSI/AWS". Due in part to the growth of the oil industry, this symbol set was used