ALICE: A Large Ion Collider Experiment, destined for the LHC at CERN.

AMANDA: Antarctic Muon and Neutrino Detector Array. Operational since 1997 and now upgraded to AMANDA-II, detects high-energy cosmic neutrinos at the South Pole.

AMS: Alpha Magnetic Spectrometer. A detector in space to search for antimatter.

ANTARES: Astronomy with a Neutrino Telescope and Abyss environmental RESearch.

APEX:AntiProton Experiment. Fermilab experiment to search for antiproton decay.

ATLAS: A Toroidal LHC ApparatuS. Detector now being built by an international collaboration for operation at the LHC at CERN. U.S. HEP community plays a major role.

BaBar: B-Bbar (anti-B) detector at SLAC's B Factory. Named for the elephant in Laurent DeBrunhoff's children's books.

BELLE: B detector at KEK in Japan.

BES: BEijing Spectrometer

BLAST: The Bates Large Acceptance Spectrometer Toroid, located at MIT.

BOREX: (or Borexino) An underground solar neutrino experiment at Gran Sasso in Italy.

BRAHMS: The Broad Range Hadron Magnetic Spectrometer located at Brookhaven.

BTeV: Proposed dedicated B physics experiment at Fermilab's Tevatron.

CAT: Cherenkov Array at Themis, an imaging telescope in France to detect very high-energy gamma rays.

CDF: Collider Detector at Fermilab, studies proton-antiproton collisions at the Tevatron.

CDMS: Cryogenic Dark Matter Search. A Fermilab/university experiment to search for the interaction of dark matter particles with the nuclei of silicon and germanium detectors, now at Stanford. Will place a detector in Soudan Mine, Minnesota.

CHAOS: Canadian High Acceptance Orbit Spectrometer.

CHOOZ: An international long-baseline reactor neutrino experiment located at the CHOOZ A nuclear power station, les Ardennes, France, completed in 1999.

CHORUS: CERN Hybrid Oscillation Research Apparatus.

CKM: Charged Kaons at the Main Injector, a proposed Fermilab experiment to measure charged kaon decay.

CLEO:Not an acronym. Goes with CESR. Get it? Detector at Cornell's CESR accelerator.

CMD-2: Cryogenic Magnetic Detector, one of the two VEPP-2M's detectors, at BINP.

CMS: Compact Muon Solenoid. Detector now being built for CERN's LHC by international collaboration including many U.S. physicists.

CNGS: CERN Neutrinos to Gran Sasso, a long-baseline neutrino oscillation experiment.

COBE: COsmic Background Explorer, a satellite launched by NASA in 1989 to search for evidence of the Big Bang. Currently in data analysis.

COMPASS: CERN's Common Muon and Proton Apparatus for Structure and Spectroscopy.

CRESST: Cryogenic Rare Event Search with Superconducting Thermometers. An experiment in the Gran Sasso Underground Laboratory to search for WIMP (Weakly Interacting Massive Particle) dark matter using cryogenic detectors.

DAMA: Particle DArk MAtter search with highly radiopure scintillators at Gran Sasso, searching for WIMPs.

DELPHI: Detector with Lepton Photon and Hadron Identification at CERN's LEP accelerator. Data taking completed in 2000.

DONUT: Direct Observation of the Nu Tau. A Fermilab fixed-target experiment to detect direct interactions of the tau neutrino.

DZero:(named for location on the Tevatron Ring) Collider detector studies proton-antiproton collisions at Fermilab's Tevatron.

E787: Brookhaven experiment at the AGS to study rare kaon decays.

EOS TPC: Equation of State Time Projection Chamber experiment, studying heavy ion collisions at Berkeley.

EXO: Enriched Xenon Observatory, searching for neutrinoless double beta-decay at WIPP.

FOCUS: FOtoproduction of Charm: Upgraded Spectrometer. A Fermilab fixed target experiment to study charm physics.

GALLEX: The Gallium EXperiment at Gran Sasso. An international collaboration used a gallium detector at Gran Sasso, Italy to measure the solar neutrino flux produced inside the sun by proton-proton fusion (concluded in 1997).

GENIUS: Germanium Nitrogen Underground Setup, a proposed experiment by Gran Sasso and Heidelberg to operate Ge detectors in liquid nitrogen.

GLAST: Gamma-ray Large Area Space Telescope. A proposed orbiting telescope for high-energy gamma rays.

H1: Collider experiment at DESY.

HADES: High Acceptance Di-Electron Spectrometer, at GSI.

HAPPEX: Hall A Proton Parity Experiment at JLAB.

HDMS: Heidelberg Dark Matter Search. Double beta decay and dark matter searches taking place at the University of Heidelberg in Germany.

HEAT: High- Energy Antimatter Telescope. A NASA-supported program of high-altitude balloon-borne experiments to study antimatter in the primary cosmic radiation.

HERA-B: Fixed-target experiment at DESY, to investigate CP violation in the B meson.

HERMES:DESY fixed-target experiment to explore spin.

Hi Res Fly's Eye: High-energy cosmic ray experiment in Dugway, Utah.

HOMESTAKE: A solar neutrino experiment in the Homestake Gold Mine in South Dakota.

HYPER-CP: A Search for Direct CP Violation in Hyperon decays. Fermilab fixed-target experiment.

ICARUS: Imaging Cosmic and Rare Underground Signal. Neutrino experiment proposed at CERN/Gran Sasso.

IGEX: International Germanium Experiment in Spain.

IMB: Irvine, Michigan and Brookhaven, a collaboration looking for neutrinoless double beta decay.

K2K: KEK to Kamioka. Long-baseline neutrino experiment using a beam from KEK accelerator to Super-Kamiokande detector in Japan.

KAMIOKANDE: A solar neutrino experiment at the Kamioka Observatory in Japan.

KAMLAND: KAmioka Liquid Scintillator Anti-Neutrino Detector, under construction in Japan.

KARMEN: Karlsruhe-Rutherford Medium-Energy Neutrino Experiment. A neutrino interaction experiment using a detector at the ISIS spallation neutron source at Rutherford- Appleton Laboratory in England.

KATRIN: KArlsruhe TRItium Neutrino experiment at FZK to measure neutrino mass.

KEDR: Not an acronym. A universal magnetic detector for Upsilon and Psi physics at BINP's VEPP-4M.

KLOE: K LOng Experiment, to study CP violation at LNF's DAFNE.

KOPIO: A Klong decay experiment at Brookhaven.

KTeV: Kaons at the Tevatron, a Fermilab fixed-target experiment to study CP violation in kaon decay.

L3: named for its location on CERN's LEP accelerator. LEP completed its run in 2000.

LAND:Large Area Neutron Detector, at GSI.

LENS: Low Energy Neutrino Spectroscopy, at Heidelberg.

LHC-B:Large Hadron Collider Beauty Experiment, being built at the LHC at CERN.

LSND: Liquid Scintillator Neutrino Detector. Neutrino oscillation experiment at Los Alamos.

LUNA: Laboratory for Underground Nuclear Astrophysics at Gran Sasso.

LVD: Gran Sasso’s Large Volume Detector, looking for neutrino bursts from stellar collapses.

MACHO: Massive Compact Halo Objects. The MACHO project is a mainly U.S. collaboration testing the hypothesis that dark matter is made up mostly of MACHOs like brown dwarfs and planets.

MICE: Muon Ionization Cooling Experiment. Approved at RAL, the goal is to realize ionization cooling in practice by showing they can design, engineer, build and measure in a beam a cooling channel capable of giving the desired performance for a neutrino factory.

MUNU: An experiment at the Bugey reactor in France studying electron - electron neutrino scattering.

Majorana: Not an acronym. Adouble beta decay experiment taking place at the DOE’s Pacific Northwest Laboratory.

MECO: Muon to Electron COnversion, an RSVP experiment at Brookhaven’s AGS.

MILAGRO: Detector to study cosmic ray air showers in the Jemez Mountains near Los Alamos, New Mexico.

MiniBooNE: Booster Neutrino Experiment, petite size. Experiment studying neutrino oscillations using Fermilab's Booster accelerator.

MINIMAX/ T-864: A search for disoriented chiral condensates at Fermilab.

MINOS: Main Injector Neutrino Oscillation Search. An experiment to study neutrino oscillations using the NuMI beam from Fermilab's Main Injector accelerator.

MIPP: Main Injector Particle Production Experiment at Fermilab.

MONOLITH: Massive Observatory for Neutrino Oscillations or LImits on THeir existence. Atmospheric neutrino detector at Gran Sasso.

MUCOOL: MUon COOLing experiment, which hopes to develop a muon ionization cooling channel for a high-luminosity muon collider.

NESTOR: Neutrino Extended Submarine Telescope with Oceanographic Research, a deep sea high-energy neutrino telescope off the coast of Greece.

NOE: Neutrino Oscillation Experiment, at Gran Sasso.

NOMAD: Neutrino Oscillation MAgnetic Detector, at CERN, dismantled in 1999.

NuMI: Neutrinos at the Main Injector, a project to send a beam of high-energy neutrinos from Fermilab to a detector in northern Minnesota, beginning in 2002.

NuSEA: NUcleon SEA. Fermilab fixed target experiment to measure the asymmetry of down and up anti-quarks in the nucleon sea (completed).

NuTeV: Neutrinos at the Tevatron, a Fermilab fixed-target experiment using a neutrino beam for precision measurement of the mass of the W boson.

OMNIS: Observatory for Multiflavor Neutrinos from Supernovae, an underground experiment at WIPP.

OPAL: Omni Purpose Apparatus for LEP, at CERN. Data taking ended in 2000.

OPERA: Oscillation Project with Emulsion-tRacking Apparatus, the neutrino detector at Gran Sasso for the long-baseline experiment CNGS.

ORLaND: Oak Ridge Large Neutrino Detector, proposed to search for neutrino oscillations at Oak Ridge.

PHENIX: Pioneering High-Energy Nuclear Interaction eXperiment, at Brookhaven.

PHOBOS: Not an acronym. Phobos is a moon of Mars, which was the name of the original proposed detector. Studies heavy-ion collisions at Brookhaven.

Pierre Auger Observatory: (No acronym) International experiment to track down the origin of ultra-high-energy cosmic rays.

pp2pp: proton-proton to proton-proton elastic scattering experiment at Brookhaven.

RAND:Radio Neutrino Detector array, located 1.5 km from the South Pole.

SAGE: Soviet-American Gallium Experiment. (Although "Soviet" changed to "Russian" a few years back, "RAGE" didn't have the right ring.) A solar neutrino detector in the Baksan Mountains of Russia.

SDSS: Sloan Digital Sky Survey. Astrophysics project to create largest-ever three-dimensional map of the sky.

SELEX: SEgmented Large X baryon spectrometer EXperiment A fixed target experiment at Fermilab to study charm baryons.

SLD: SLAC Large Detector, optimized for physics at the SLC interaction point (Data taking now completed).

SNAP: SuperNova Acceleration Probe, a proposed satellite to measure the Universe's rate of expansion.

SND: Spherical Neutral Detector, the other of the two VEPP-2M's detectors at BINP.

SNO:Sudbury Neutrino Observatory. A solar-neutrino detector near Sudbury, Ontario, Canada.

SOUDAN II: Soudan II underground detector, in an underground laboratory in the Tower-Soudan Iron Mine in Soudan, Minnesota, to search for nucleon decay and study atmospheric neutrino physics.

SPY: Secondary Particle Yield, a CERN experiment to measure the production rates of pions and kaons.

STAR: Solenoidal Tracker At RHIC, looking for quark-gluon plasma at Brookhaven.

Super-K: Super-Kamiokande experiment to detect neutrino oscillations from atmospheric neutrino flux, in Japan.

TAPS: Two-Arm Photon Spectrometer, German experiment to measure hard photons and neutral mesons.

TISOL: TRIUMF Isotope Separator OnLine.

TOSCA: Toplological Oscillation Search with kinematic analysis, the intended CERN follow-up project to CHORUS and NOMAD.

UNO: Underground Nucleon decay and neutrino Observatory, located at WIPP.

ZEUS: (Not an acronym, but goes with HERA) Collider experiment at DESY's HERA.