SCPs/Classes

Almost all SCP files use some sort of classification system to categorize SCP objects. The exact details of how these classes are assigned can vary greatly depending on the article, but they pertain mostly to how the Foundation contains the SCP and the complications that are involved in the process.

Traditionally, SCPs are assigned one of multiple different Object Classes (sometimes called Containment Classes), which usually describe the difficulty level of keeping the anomaly contained. Most SCP articles, especially before the Anomaly Classification System (ACS) was created, only assign a single Object Class for each anomaly. Post-ACS, most newer articles use either one or two Containment Classes: Primary and/or Secondary (also called Esoteric), plus a few additional categories.

Common Classes
These are the three classic Object Classes, which are most commonly found in the vast majority of SCP articles.

Secondary/Esoteric Classes
The following Object Classes are sub-classes that supplement the object's primary (or former) classification. An Esoteric object is an SCP that doesn't fall into the previous categories.

Subclasses

 * Suffix System


 * Type System


 * Object/Containment System


 * Additional Systems

Anomaly Classification System
ACS is a new template for classifying SCPs, which adds other categories to supplement the Object Classes (both Primary and Secondary).