This is a place where I intend to try to collect and acronym major achievements in Dwarf Fortress history.
Acronym Count: 14
A.R.G.H.M.Y.S.P.L.E.E.N.: Agonizing Realms of Greatly Harmful Medical Yore; Stories of People Leaving Every Extremity Nowhere. Medical !!SCIENCE!!. Many dwarves killed in the name of keeping dwarves alive.
B.U.R.N.I.T.A.L.L.: Big, Unplanned Really Not Idiot-proof Tower; A Legendary Land.
The fortress. A succession fort from way back in the 2D version, Boatmurdered had the first recorded magma cannon, killer elephants, lots of goblins, more ashes than you could find a use for, Horrors of the Underground, and ended in a tantrum spiral that had but two survivors, one a child.
D.O.R.C.P.U.T.E.R.: Dwarves Operate Really Complex Primarily Useless Type of dEvice for numbeRs. A computer in DF, built in a cave with a bunch of rocks. Needs new acronym.
E.L.F.K.I.N.G.: Eternal Legend; Forest-Kin In Nobility of Ground-dwellers. The tale of Cacame Aweminidae, the Elf King of Dwarves.
F.I.R.S.T.U.R.I.S.T.: Fairly Incredible Revelation of a Singular Traveler: Urist 1, Riveting Installments Show the Tale! The
original Urist.
H.A.L.L.E.G.E.N.D.S.: Hall Amazingly, Lovingly Lathered with Great Eternal Names of Dwarves' Stories. The Hall of Legends, full of famous tales.
H.E.A.D.S.H.O.T.: Headshoots, Evermore Another Dwarven Succession Home Of Terror. Headshoots is a succession fortress which I don't know much about, so this info will need to be expanded on.
M.O.S.T.I.N.T.E.R.E.S.T.I.N.G.D.W.A.R.F.: Many Overtrained Skills to Try to Incrediblize (Not Truly English) Really Excellent Super-Trained Incredibly Nimble Ground-Dweller. Morul gets to legendary in every skill then extant.
M.U.R.D.E.R.B.R.O.N.S.E.: Many Unnamed Ripped-apart Dwarves Eaten by Rashas, Beast-forgotten; Revenge, Oggez Now Slain; Excellent. Oggez Rashas was a forgotten beast. It attacked Bronzemurder, a dwarven fortress, which ended with only three survivors. Will they survive? Read this illustrated tale to find out.
O.O.P.S.: Oblivious Overseer Pierces Spoilers. Well, someone is mislead into releasing some spoilers. The big ones, menacing with spikes of not-secret.
Q.U.E.E.N.M.C.B.A.D.A.S.S.: Queen of the Underground, Elves Eat her Neighbors; Many Creatures Blown-Apart Dead; At-end Single Survivor. Tholtig Cryptbrain, the last of an era, who slew 2,340 elves and a cyclops. That is the longest recorded kill list of ANY dwarf.
S.E.A.S.E.R.P.E.N.T.: Sphalerite Evermore Amazes; Strange Experiments; Reptiles, Pachyderm-Eating, Now Tamed. Sphalerite's Sea Serpent Stuff.
S.E.Q.U.E.L.I.N.T.H.E.I.R.Y.: Second Event. Queen Underground Enters, Leaves Insane. Now The Headshoots Event In Relatively Yorish. End of the acronym needs work, but currently means that it's supposed to be in the same world as Headshoots. It takes place in an evil glacier biome and is sieged by abominations "born of Headshoots" (i.e. modded in and inspired by Headshoots). I don't know much about it, but I think the queen came early and went insane. Or maybe that was Headshoots.
V.I.D.E.O.: Various Idiosyncrasies Depicted on Electronic Optics. A video (in German), depicting dwarves going through various things all major fortresses deal with, from weird engravings to "On Break" doctors to catsplosions to killer unicorns to floods to an engraving-of-cats-splosion to massive migrant waves.
This is nowhere near complete, but I will add to this as time goes on. Partly to stockpile !!SCIENCE!!, legendary tales, and miscellaneous awesome stuff in one place, but mostly because I like making acronyms. Feel free to add suggestions of SCIENCE (flames optional) or stories that you feel should be added.