These prefixes are often used to denote specializations of facilities or facility sections, and are often omitted even in internal communication. These prefixes are not exclusive and can be used together to form a Facility name, and additional prefixes may be used for sites with a particular specialization. Certain terms have been assigned their own color codes to enable Sites and Areas with a similar function to be more easily identified.
Armed denotes a facility or facility section with abnormally high physical security concerns, either due to containment of violent hostile entities or threat of outside attack. Such facilities typically have a large amount of military-grade weaponry and vehicles as well as a disproportionately large number of permanent security staff; in the case of a full facility, this typically entails a detachment of at least battalion or regiment strength.
Biological or Bio-facilities contain and research living organisms and infectious or otherwise biohazardous anomalies. These facilities are both isolated and self-contained to prevent the escape and spread of these entities.
Containment facilities or facility sections are primarily equipped and intended for the mass containment of anomalous objects, entities, or phenomena.
Dimensional containment facilities or facility sections deal with extra-dimensional apertures or anomalies exhibiting inconsistent or warped spacetime, or anomalies of ontokinetic nature in general.
Humanoid containment facilities or facility sections primarily deal with sentient, sapient human or near-human entities capable of understanding and complying with instructions, and often attempt to develop means of communication with them to facilitate containment.
Most often used by Δt personnel, Exclusionary Sites are unaffected by reality-changing effects, and are often built outside of reality itself.
Extrasolar Facilities are located outside of the Solar System containing the planet Earth.
A Lunar facility is located on the moon, for the containment of extraplanetary anomalies.
Protected facilities and facility sections are "safe zones" kept free of anomalous influence. No anomalies are allowed within these facilities at any time. Generally used for administration, data storage, and for housing essential personnel.
Provisional facilities are those that are established or built around an immobile anomaly. Provisional facilities typically contain only a single anomaly, although many Provisional facilities have later been expanded to contain additional anomalies.
Reliquary facilities or facility sections are designed for handling artifacts and objects of religious or historical significance.
Research facilities or facility sections are designed for either the handling and study of anomalies or anomalous materials, or research and development into new containment schemes and methods.
Storage facilities or facility sections are intended for long-term mass storage of non-anomalous material or inert anomalies with no risk of autonomous interaction, including Anomalous Items and inanimate Safe-class SCP objects
Surveillance sites monitor their surroundings, or send field operatives out further afield, in order to search for anomalies not currently in containment.