Plurals of abbreviations are formed in the same way as the regular plurals of common nouns: simply by adding the letter s. Note that there is no apostrophe before s, which is written in lower case.
When the singular form of the abbreviation ends in s, that form can also be used to refer to a plural group. This avoids the uncomfortable effect of seeing an s repeated.
 | FAQs (frequently asked questions) |
| SMEs (small and medium-sized enterprises) |
| VLEs (virtual learning environments) |
When the singular form of the abbreviation ends in s, that form can also be used to refer to a plural group. This avoids the uncomfortable effect of seeing an s repeated.
| SDS (safety data sheet) |
| SDS (safety data sheets) |
Recommended citation:
«Abbreviations and plurals» [en línia]. A: Llibre d’estil de la Universitat de Barcelona. Barcelona: Universitat de Barcelona. Serveis Lingüístics. <https://www.ub.edu/llibre-estil/criteri.php?id=2369> [consulta: 8 novembre 2025].