Journal articles often include abbreviations:

• subject/industry specific e.g. the name of a governing body
• article specific as defined by the authors which should be listed in the article
• units e.g. min, mL, cm
• associated with academic publishing: page number, issue numbers, abbreviations used within citation formats.

Abbreviation markup is not in WCAG 2.2 AA, but in AAA, so adding this issue to be reviewed in Phase 2 of the A11y project.