4-H

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8000ers.com

AbleGamers

American Coaster Enthusiasts

American Crossword Puzzle Tournament

American Numismatic Society

American Society of Ichthyologists and Herpetologists

Archaeology in the Community

AugmentifyIt

Behind the Stunts

Berkely Seismology Lab

Botanic Gardens Conservation International

British Ecological Society

British Microlight Aircraft Association

CANNA UK National Giant Vegetables Championship

Cape Long Distance Swimming Association

Channel Swimming Association

University of Essex: Coral Reef Research Unit

Council on Tall Buildings and Urban Habitat

Desert Research Institute

DogFest

ESPN X Games

European Coaster Club

Fédération Internationale des Sociétés Magiques

Foundation for Environmental Education

Gareth Jones' Lab

Gerontology Research Group

Great Pumpkin Commonwealth

International Association for Bear Research and Management

International Federation of Robotics

International Gem Society

International Ice Swimming Association

International Mineralogical Association

International Ornithologists' Union

International Slackline Association

International Society of Limnology

International Surfing Association

The IRONMAN® Group

IUCN SSC Small Mammal Specialist Group

IUCN World Commission on Protected Areas

Lake Geneva Swimming Association

Major League Eating

Marine Biological Association

Marine Megafauna Foundation

Metacritic

MonumentalTrees.com

National Cave & Karst Research Institute

National Oceanic and Atmospheric Administration

National Speleological Society

Natural Arch and Bridge Society

Natural History Museum Vienna

Ocean Rowing Society

Open Water Africa

Parrot Analytics

Paul Zimnisky Diamond Analytics

Polar Expeditions Classification Scheme

Perth College: Centre for Mountain Studies

Royal Botanic Gardens, Kew

Royal Entomological Society

Sail Training International

School of Ants Australia

Scott Polar Research Institute

Scripps National Spelling Bee

Speedrun.com

The Cornell Lab

The H J Lutcher Stark Center for Physical Culture & Sports

The Harlem Globetrotters

The International Cat Association

The Malacological Society of London

The Numbers

The Trichological Society

Times Tables Rock Stars

UCL: The Bartlett School of Architecture

UK & International Timing Adjudication

UltimateUngulate.com

UNion Internationale de la MArionnette

University of Birmingham: Genomics of Ageing and Rejuvenation Lab

University of Southern California

VGChartz

Whale and Dolphin Conservation

World Cube Association

World Flying Disc Federation

World Freestyle Football Association

World Jigsaw Puzzle Federation

World Karate Federation

World Memory Sports Council

World Meteorological Organization

World Minigolf Sport Federation

World Open Water Swimming Association

World Sailing Speed Record Council

World Sport Stacking Association

World Surf League

World Ultracycling Association

Xpogo

Yellowstone Forever

ZSL Institute of Zoology