History Main / MagicalDatabase

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* ''LightNovel/ACertainMagicalIndex'' has the eponymous Index Librorium Prohibitorium, a little girl who happens to have thousands upon thousands of magical books stored within her mind. As such, the power she holds within her is equally dangerous.

* The ''Wiki/SCPFoundation'' is a TheMenInBlack-esque organization that keeps a database of all their supernatural and preternatural objects, and technically the wiki itself ''is'' that database.

Databases. They make finding information as easy as typing a query. Some works extend this capability to finding information on the supernatural elements of the setting. You want information on known [[OurWerewolvesAreDifferent werewolves]], {{undead}}, or wizards, this is where you go.

* Yue's artifact in ''Manga/MahouSenseiNegima''. It uncovers most of the information needed by the user.

[[folder:Web Comic]]
* CABAL, the MagiTek supercomputer operated by the Inquisition in ''WebComic/ExterminatusNow'' is supposed to be this. The protagonists mostly use it to store porn and pirated mp3s, of course...

* ''TabletopGame/{{Warhammer 40000}}'' has the Black Library (not to be confused with the identically named ExpandedUniverse publication), a library that stores the information of just about everything involving the supernatural and daemonic, guarded by the Harlequins of the Laughing God, thus making it inaccessible to most of them.
** The Infinity Circuit of an Eldar craftworld. In addition to being a repository for the souls of their dead, Eldar can use the circuit to ask questions and seek wisdom, and even send messages to each other. It's basically a giant computer network, except you access it with PsychicPowers and it's powered by the souls of the departed instead of electricity, so this example gets bonus points for taking the "Magical" part of the trope name and making it literal.

* In ''Literature/TheDresdenFiles'', there are a couple of sentient examples. In the very first book we're introduced to Bob, a "Spirit of Intellect" who knows a ''lot'' about all things magic and helps Harry quite a bit. Later Harry meets the Archive, who knows literally anything that's ever been written down. No one refers to her as anything but "the Archive", but Harry think that's awkwardly formal for a seven year old girl, so he calls her Ivy. (The position is passed from mother to daughter; Ivy's grandmother unexpectedly died young, and her mother killed herself because she couldn't handle being the Archive.)

* In the ''Franchise/DresdenFiles'' series, there are a couple of sentient examples. In the very first book we're introduced to Bob, a "Spirit of Intellect" who knows a ''lot'' about all things magic and helps Harry quite a bit. Later Harry meets the Archive, who knows literally anything that's ever been written down. No one refers to her as anything but "the Archive", but Harry think that's awkwardly formal for a seven year old girl, so he calls her Ivy. (The position is passed from mother to daughter; Ivy's grandmother unexpectedly died young, and her mother killed herself because she couldn't handle being the Archive.)

* In the ''Franchise/HarryDresden'' series, there are a couple of sentient examples. In the very first book we're introduced to Bob, a "Spirit of Intellect" who knows a ''lot'' about all things magic and helps Harry quite a bit. Later Harry meets the Archive, who knows literally anything that's ever been written down. No one refers to her as anything but "the Archive", but Harry think that's awkwardly formal for a seven year old girl, so he calls her Ivy. (The position is passed from mother to daughter; Ivy's grandmother unexpectedly died young, and her mother killed herself because she couldn't handle being the Archive.)

* The Journals from ''WesternAnimation/GravityFalls", which contain information on such things as how to defeat gnomes among others.
* The character Skips in ''WesternAnimation/RegularShow" is often relied on for explanations of supernatural occurrences.