A fanzine is made by fans for other fans. A prozine is a professional magazine produced for a paying market. Science fiction fandom grew in conversation with prozines but developed its own amateur publishing culture through fanzines.

| Quick fact | Information |
|---|---|
| Fanzine | Fan-made, community-centered, usually amateur |
| Prozine | Professional magazine, commercial or paid market |
| Shared world | Science fiction publishing and fandom |
| Main distinction | Purpose and production structure |
Fanzines
Fanzines carried letters, essays, reviews, art, jokes, arguments, convention reports, and personal writing. They were usually produced for a small network rather than a newsstand market.
Prozines
Prozines such as Amazing Stories, Astounding, or Galaxy published professional fiction, articles, and editorial matter for subscribers and buyers.
Why the Difference Matters
The two worlds fed each other. Prozine letter columns helped fans meet; fanzines helped fans build a culture that eventually produced writers, editors, critics, and convention organizers.
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