SCP foundation Class D Sticker for Sale by Jack O TV

What is SCP Foundation? - Yoors

SCP ACS Diagram (I saw another one somewhere on here, but it didn't have all the info I wanted, so I made a more accurate, but uglier version) : r/ SCP

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

Containment level logos (TheVolgun) : r/SCP

SCP Archives - Tag yourself. What Classification Are You?

Anomaly Classification Bar for ACS - SCP Foundation

SCP Classifications Explained, Learn About SCP Foundation: All SCP Archives in Order, Podcasts on Audible

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

Class-D Personnel, SCP Database Wiki

The SCP Foundation by Miguel Burgos Contreras