Editing Turn (angle) (section)

== Unit symbols ==

There are several unit symbols for the turn.

=== EU and Switzerland ===
The German standard [[DIN 1315]] (March 1974) proposed the unit symbol "pla" (from Latin: {{lang|la|plenus angulus}} 'full angle') for turns.<ref name="German_2013"/><ref name="Kurzweil_1999"/> Covered in {{ill|DIN 1301-1|de}} (October 2010)<!-- in a table "allgemein anwendbare Einheiten außerhalb des SI" -->, the so-called {{lang|de|Vollwinkel}} ('full angle') is not an [[SI unit]]. However, it is a [[legal unit of measurement]] in the EU<ref name="EWG_1980"/><ref name="EG_2009"/> and Switzerland.<ref name="Einheitenverordnung_1994"/>

=== Calculators ===
The scientific calculators [[HP&nbsp;39gII]] and [[HP&nbsp;Prime]] support the unit symbol "tr" for turns since 2011 and 2013, respectively. Support for "tr" was also added to [[newRPL]] for the [[HP&nbsp;50g]] in 2016, and for the [[hp&nbsp;39g+]], [[HP&nbsp;49g+]], [[HP&nbsp;39gs]], and [[HP&nbsp;40gs]] in 2017.<ref name="Lapilli_2016"/><ref name="Lapilli_2018"/> An angular mode <var>TURN</var> was suggested for the [[WP&nbsp;43S]] as well,<ref name="Paul_2016"/> but the calculator instead implements "MUL{{pi}}" (''[[multiples of π|multiples of {{pi}}]]'') as mode and unit since 2019.<ref name="Bonin_2019_OG"/><ref name="Bonin_2019_RG"/>