Editing Encyclopedia:Manual of Style (section)

===Do not invent===
Avoid devising [[Wikipedia:Wikipedia is not a dictionary#Neologisms|new abbreviations]], especially acronyms. For example, {{xtn|World Union of Billiards}} is good as a {{em|translation}} of {{xt|[[Union Mondiale de Billard]]}}, but neither it nor the reduction {{!xt|WUB}} is used by the organization or by independent sources; use the original name and its official abbreviation, {{xt|UMB}}.

If it is necessary to abbreviate in a tight space, such as a [[Wikipedia:Manual of Style/Tables#Captions and headers|column header in a table]], use widely recognized abbreviations. For example, for {{xt|New Zealand gross national product}}, use {{xt|NZ}} and {{xt|GNP}}, with a link if the term has not already been written out in the article: {{xt|NZ&nbsp;[[Measures of national income and output|GNP]]}}. Do not make up initialisms such as {{!xt|NZGNP}}.