Enclosed Alphanumeric Supplement Unicode Block
Enclosed Alphanumeric Supplement is a collection of symbols designed to extend the visual repertoire of circled, parenthesized, and squared alphanumeric forms, primarily for use in lists, annotations, and specialized typography. It includes double‑circled numbers, negative circled digits, and parenthesized ideographs, among other variants, which serve as decorative or organizational markers in documents and digital interfaces. The block also features regional indicator symbols, which are paired to represent country flags through a two‑letter code system, and a set of squared Latin letters used in certain East Asian contexts for notation or emphasis. These characters complement earlier enclosed numeral sets by offering additional styles and coverage for languages and use cases that fall outside the basic range.