Editing R (programming language) (section)

== Implementations ==
The main R implementation is written primarily in [[C (programming language)|C]], [[Fortran]], and [[Self-hosting (compilers)|R itself]]. Other implementations include:
* [http://www.pqr-project.org pretty quick R] (pqR), by [[Radford M. Neal]], attempts to improve [[memory management]].
* [[Renjin]] is an implementation of ''R'' for the [[Java virtual machine|Java Virtual Machine]].
* [https://www.cs.kent.ac.uk/projects/cxxr CXXR] and Riposte<ref>{{cite book
  |last1=Talbot
  |first1=Justin
  |last2=DeVito
  |first2=Zachary
  |last3=Hanrahan
  |first3=Pat
  |title=Proceedings of the 21st international conference on Parallel architectures and compilation techniques 
  |chapter=Riposte: A trace-driven compiler and parallel VM for vector code in R
  |date=1 January 2012
  |pages=43–52
  |doi=10.1145/2370816.2370825
  |publisher=ACM
  |isbn=9781450311823
  |s2cid=1989369}}</ref> are implementations of ''R'' written in [[C++]].
* [[Oracle Corporation|Oracle's]] [https://github.com/oracle/fastr FastR] is an implementation of ''R'', built on [https://www.graalvm.org/ GraalVM].
* [[TIBCO Software]], creator of [[S-PLUS]], wrote TERR — an ''R'' implementation to integrate with [[Spotfire]].<ref>Jackson, Joab (16 May 2013). [http://www.pcworld.com/article/2038944/tibco-offers-free-r-to-the-enterprise.html TIBCO offers free R to the enterprise]. ''PC World''. Retrieved 20 July 2015.</ref>

Microsoft R Open (MRO) was an ''R'' implementation. As of 30 June 2021, Microsoft started to phase out MRO in favor of the CRAN distribution.<ref>{{cite web
  |title=Looking to the future for R in Azure SQL and SQL Server
  |date=30 June 2021
  |access-date=7 November 2021
  |url= https://cloudblogs.microsoft.com/sqlserver/2021/06/30/looking-to-the-future-for-r-in-azure-sql-and-sql-server/}}</ref>