Explaining the Containment classes and secondary class of the SCP

Anomaly Classification System (ACS) Guide - SCP Foundation

Anomaly Classification System (ACS) Guide - SCP Foundation

Poster

SCP Anomaly Classification System Poster (Aged Version) | Poster

Special Containment Procedures for different classes in a nutshell : r/DankMemesFromSite19

Into the Unknown: Exploring the SCP Foundation - TurboFuture

Object Classes, SCP Database Wiki

For all personnel confused by the new Anomaly Classification System, I've made an at-a-glance poster for your office/room (higher resolution versions available on request). : r/SCP

Anomaly Classification System (ACS) Guide - SCP Foundation

A Comprehensive Guide to SCP Classes for New Foundation Recruits

Explaining the Containment classes and secondary class of the SCP Foundation, Object classes

If you want more cool ACS secondary class icons - SCP Foundation