[[Fil:Apple iPhone.jpg|thumb|[[Apple Inc.|Apples]] [[iPhone]] fremstilles af virksomheden [[Foxconn]] på en OEM-aftale]]
En '''original equipment manufacturer''' eller en '''OEM''', fremstiller produkter eller komponenter, som købes af en anden virksomhed og sælges under den købende virksomheds [[mærke]] eller firmanavn.<ref name=def>[http://www-03.ibm.com/ibm/history/documents/pdf/glossary.pdf Dictionary of IBM and computing] official IBM site
*{{cite news
| author =Tracy Kidder
| title =The Soul of a New Machine - CHAPTER ONE- How to Make a Lot of Money- 16th paragraph
| quote =companies known as original equipment manufacturers, or OEMs
| url =http://www.businessweek.com/chapter/kidder.htm
| publisher =Random House Inc
| isbn =0-679-60261-5
| date =(C)1997
| accessdate =2008-08-08
| archiveurl =https://web.archive.org/web/20140218031239/http://www.businessweek.com/chapter/kidder.htm#contents
| archivedate =18. februar 2014
| url-status =bot: unknown
}}
*[http://www.economist.com/surveys/displaystory.cfm?story_id=E1_PVPVNGJ Moving On] The Economist, Jan 13th 2005</ref> OEM referer til den virksomhed der oprindeligt fremstillede produktet på dansk: "den originale produktfremstiller".
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