A complete guide to SCP object classes (based on u/Cooldude971's list) : r/ SCP

SCP Foundation Classes by CalicoStonewolf on DeviantArt

SCP Anomaly Classification System Poster (Aged Version) iPad Case & Skin for Sale by Puzzlr

Anomaly Classification Bar for ACS - SCP Foundation

Explaining the Risk class and Disruption class of the SCP foundation, object classes, pt. 2

SCP Archives - Tag yourself. What Classification Are You?

Euclid Classification SCP Foundation Secure Contain Protect Long Sleeve T-Shirt

Anomaly Classification Bar for ACS - SCP Foundation

Keter Classification SCP Foundation Secure Contain' Baseball Cap

SCP Foundation Members Tees, Class Obejct : EUCLID Poster for Sale by Yu-u-Ta

1> CONTAINMENT CLASS 2> DISRUPTION CLASS 3> RISK CLASS 4> SECONDARY CLASS CONTAINMENT SECONDARY CLASS APOLLYON Uncontainable and world-ending. ARCHON 'Can be co…