Web, domains and email
POUR
Abbreviation for Perceivable, Operable, Understandable, Robust
In short and in plain language
POUR sums up the main ideas behind the rules for web content without barriers.
The ideas are: perceivable, operable, understandable and robust.
Each rule belongs to one of them. So a report that checks a site for barriers often sorts its findings this way.
Definition
POUR summarises the core principles of the WCAG: perceivable, operable, understandable and robust. Every success criterion of the guidelines is assigned to one of these principles. Accessibility audit reports therefore often organise their findings by these principles.