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[[File:Tek New PNs-2.1.65.pdf|300px|thumb|right|link=https://w140.com/tekwiki/images/9/98/Tek_New_PNs-2.1.65.pdf|Feb 1965 Announcement Letter Introducing the New Part Number System (click to enlarge) ]] | [[File:Tek New PNs-2.1.65.pdf|300px|thumb|right|link=https://w140.com/tekwiki/images/9/98/Tek_New_PNs-2.1.65.pdf|Feb 1965 Announcement Letter Introducing the New Part Number System (click to enlarge) ]] | ||
===6-digit Scheme (1947–1964)=== | ===6-digit Scheme (1947–1964)=== | ||
The original number scheme, used | The original number scheme, used until February 1965, had a 3-digit product group prefix followed by a 3-digit part number, e.g. [[013-013]]. | ||
===9-digit Scheme (1965–)=== | ===9-digit Scheme (1965–)=== |