Editing De facto standard (section)

===Miscellaneous===
 
* Many American-made [[spark plugs]] require a {{frac|13|16}}-inch hex socket (21mm) to remove or install.
* The 1/2 inch (12.7mm) spacing of the rollers in a [[bicycle chain]].
* The [[IBM Personal Computer]] (PC). By one year after its 1981 release, [[John Dvorak]] described the PC as rapidly becoming a "de facto standard microcomputer".<ref name="zussman19820823">{{cite news |url=https://books.google.com/books?id=VDAEAAAAMBAJ&pg=PA29 |title=Let's keep those systems open |work=InfoWorld |date=1982-08-23 |access-date=29 January 2015 |author=Zussman, John Unger |pages=29}}</ref> With the [[MS-DOS]] and [[Microsoft Windows]] [[operating system]]s, it gained a large share of the personal computer market. Because of the great [[influence of the IBM PC on the personal computer market]], competing products like the [[Rainbow 100]] were eventually withdrawn.
* Programming languages that have multiple implementations such as [[PHP]] tend to also have a ''de facto'' standard. In PHP's case the ''de facto'' standard is the binaries available from php.net, rather than the [[Phalanger (compiler)|Phalanger]] implementation.
* Use of programming languages [[R (programming language)|R]] and [[Python (programming language)|Python]] in science and engineering disciplines, other than computer science, where automated analysis of data is required, while remaining simple enough for a non-professional.
* [[TeX]] typesetting system, commonly used in creating scientific articles and reports for publication (in fact many journals require the publication to be fully written in TeX).<ref>{{cite journal |last=Beebe |first=Nelson H. F. |date=2003 |title=25 Years of TEX and METAFONT: Looking Back and Looking Forward |url=https://tug.org/TUGboat/Articles/tb25-1/beebe-2003keynote.pdf |journal=TUGboat |pages=10}}</ref>