A Main List is the primary vector for organizing the primary contents of a containment fiction writing collection, a long list of all articles usually in numerically chronological order with listed titles. The style was originally designed by the Holders and popularized by the SCP Wiki. Most containment fiction communities have utilized this since then, with some exceptions such as the Liminal Archives who can’t be said to have any one main list.
This is contrasted with lists for -J articles and other variations, which are not seen as canonical or otherwise not intended to be consumed alongside the “main” contents of a site.