A11

A11 is an alphanumeric designation used in several different contexts, often as a model number, product code, or shorthand in written language. The exact meaning of A11 depends on the field and the organization that assigns the label, and it is not tied to a single universally recognized concept.

In hardware and consumer electronics, A11 is most notably associated with Apple’s A11 Bionic chip. Introduced in 2017, the A11 Bionic powers devices such as the iPhone 8, iPhone 8 Plus, and iPhone X. It features six CPU cores (two high-performance and four efficiency cores), a three‑core GPU, and Apple’s Neural Engine for machine learning tasks. The chip was manufactured on a 10-nanometer process and marked a step forward in performance and energy efficiency for Apple’s mobile lineup.

In digital accessibility discussions, the term a11y is a common numeronym for accessibility, formed as “a” + 11 letters + “y” from the word accessibility. This shorthand is widely used in documentation and discussions about making software and websites usable by people with disabilities. The form a11y is well established, while the shorter form a11 is not standard and is rarely used as a standalone term.

Beyond these, A11 can appear as a general model or code in various industries, where its meaning is determined by the specific product line or organization. Context is essential to distinguish among these uses.