Circular86 is a web directory — a structured index of active websites organised into 22 subject categories. The directory was established to provide a public record of online presences across a range of industries, from technology and healthcare to travel, law, and finance. Every site in the index has been submitted by its operator and reviewed before being admitted to the record. The approval process is straightforward: sites that are active and fall within one of the 22 categories are accepted without charge. Sites that are inactive or do not correspond to any listed category are not added. The index currently holds 836 approved entries. Coverage spans operators from the United Kingdom, Europe, Asia, North America, and other regions, reflecting the international character of the open web. Category pages display all approved entries within each section, together with a brief description of what that section covers. Circular86 does not sell placement, rank entries by payment, or accept sponsored inclusions. The record is maintained as a neutral reference. If you operate a website and wish to have it listed, the submission form is available from the home page. The directory takes its name from the indexing tradition: a circular, sequential record updated as new entries arrive. The 86 is arbitrary — a marker, not a version number.