1950s

When we aren't sure of a date, use this broad term, and hope to pin it down better later.

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Births and Deaths:

Convention series started or ended:

Onetime conventions:

Bids:

Publications started or ended:

ASFO - Antipodes - Argassy - Authentic - Ballard Chronicles - Blick in die Zukunft - Camber Art Folio - Canadian Capers - Cloche by Night - Cosmos Bulletin - Dan'ls Babel - Detroit Propaganda - Duckspeak - Fan-Fare - Fantasi - Galaxy - Gung Ho! - Kteic - Lyric - Maelstrom - Mallophagan - PITFCS - Polaris - Rapier - Sic - Starmag - The Cosmic Frontier - The Nekromantikon - Toto - Tyrann - Ur & Xanadu Review - Vampire Trader - Voila

Publishers founded or closed:

Fantasy Publishing Company, Inc.

Awards made, started or ended:

Stores opened or closed:

F. and S. F. Book Co. - Medway Science & Fantasy Centre Bookshop - SF Bookstores - Science Fiction Unlimited

Clubs founded or disbanded:

ASFO - Baltimore SF Forum - Baltimore Science Fiction Forum - EISFA - ETRO - Fanarchists - ISFS - MaD Productions - Meteor - NYSFCircle - Oklahoma Science Fiction Confederation - SF Club de Paris - Surrey Circle - Tellurian Sciencefictioneers - The Terrans - Twin Cities Fantasy Society - Utopia

Fanhistory:

Ballard Code for Fan Feuds - Golden Age - Harris-White Feud - Hieronymus Machine - Operation Shamrookie - Smof - Smooth - Soggies - Steam

New fanspeak coined:

Corflu - Croggle - E-stenciller - Fancestor Worship - Faunch - Ferschlugginer - Gopher - Grotch - Kteic - Lost World - Negoboo - Potrzebie - Pseudo-Campbell - Said-Bookism - Smof - Smooth - Soggies - Taper - Zorch

Miscellaneous:

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Asia:

Australia:

The Arcturian Players

Britain:

Authentic - BRE - Belfast Triangle - Camber Art Folio - Cloche by Night - Cosmos Bulletin - Harris-White Feud - Inchmery Fandom - MaD Productions - Medway Science & Fantasy Centre Bookshop - Operation Shamrookie - Soggies - Steam - Surrey Circle - Tentacles Across the Sea

Canada:

Canadian Capers - Rapier

Europe:

Blick in die Zukunft - Cosmos Bulletin - Fantasi - Galaxy - ISFS - Meteor - SF Club de Paris - Utopia

Ireland:

Belfast Triangle - Harris-White Feud

New Zealand:

US:

ASFO - Antipodes - Argassy - Ballard Chronicles - Baltimore SF Forum - Baltimore Science Fiction Forum - Dan'ls Babel - Detroit Propaganda - Duckspeak - EISFA - ETRO - F. and S. F. Book Co. - Fan-Fare - Fanarchists - Fantasy Publishing Company, Inc. - Gung Ho! - Ipsy-Wipsy Institute - Ivory Birdbath - Jack Harness - Kteic - Lyric - Maelstrom - Mallophagan - NYSFCircle - Nunnery - Oklahoma Science Fiction Confederation - PITFCS - Polaris - Riverside Dive - Science Fiction Unlimited - Sic - Starmag - Steam - Tellurian Sciencefictioneers - Tentacles Across the Sea - The Birth of a Notion - The Cosmic Frontier - The Nekromantikon - The Terrans - Twin Cities Fantasy Society - Tyrann - Ur & Xanadu Review - Vampire Trader - Voila

Rest of the World: