Editing Master–slave (technology) (section)

== History ==

The ''master–slave'' terminology was first used in 1904.<ref>{{cite journal |url=https://www.researchgate.net/publication/236752849 |doi=10.1353/tech.2007.0066|title=Broken Metaphor: The Master–Slave Analogy in Technical Literature |year=2007 |last1=Eglash |first1=Ron |journal=Technology and Culture |volume=48 |issue=2 |pages=360–369 |s2cid=1358719 }}</ref> 

The terminology was used in 1988 for RFC 1059 and in 1997 for RFC 2136, related to the [[domain name system]]. In 2020, [[Paul Vixie]] commented on his choice of words:

<blockquote>I introduced the master/slave terminology in RFC 2136, because I needed names for the roles in an [[DNS zone transfer|AXFR/IXFR transaction]], and the zone transfer hierarchy could be more than one layer deep, such that a server might initiate some AXFR/IXFR's to the "primary master" but then respond to AXFR/IXFR's from other servers. In retrospect I should have chosen the terms, "transfer initiator" and "transfer responder". However, the [[hydraulic brake]] and clutch systems in my car had "[[master cylinder]]s" and "slave cylinders", and so I did not think I was either inventing a new use for the words "master" and "slave", or that my use of them for this purpose would be controversial.<ref>[https://mailarchive.ietf.org/arch/msg/dnsop/RFbV_nBJdJSvBhByxH30K7zvSxw/ Re: DNSOP Question regarding RFC 8499]</ref></blockquote>

Said [[hydraulic brake]]s for the automotive industry were patented in 1917 by [[Malcolm Loughead]].<ref>Loughhead, Malcolm, [http://pdfpiw.uspto.gov/.piw?docid=01249143&PageNum=1&&IDKey=57615156EEFC&HomeUrl=http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1%2526Sect2=HITOFF%2526d=PALL%2526p=1%2526u=%25252Fnetahtml%25252FPTO%25252Fsrchnum.htm%2526r=1%2526f=G%2526l=50%2526s1=1249143.PN.%2526OS=PN/1249143%2526RS=PN/1249143 "Braking apparatus, "] {{Webarchive|url=https://web.archive.org/web/20200723192923/https://pdfpiw.uspto.gov/.piw?docid=01249143&PageNum=1&&IDKey=57615156EEFC&HomeUrl=http%3A%2F%2Fpatft.uspto.gov%2Fnetacgi%2Fnph-Parser%3FSect1%3DPTO1%2526Sect2%3DHITOFF%2526d%3DPALL%2526p%3D1%2526u%3D%25252Fnetahtml%25252FPTO%25252Fsrchnum.htm%2526r%3D1%2526f%3DG%2526l%3D50%2526s1%3D1249143.PN.%2526OS%3DPN%2F1249143%2526RS%3DPN%2F1249143 |date=2020-07-23 }} U.S. Patent no. 1,249,143 (filed: 1917 January 22; issued: 1917 December 4).</ref> The term ''slave cylinder'' was used in other patent applications, including one by [[Robert Esnault-Pelterie]], published in 1919.<ref>{{Cite web|url=https://patents.google.com/patent/CH94537A|title=Hydraulic power transmission installation}}</ref>