firefly , List of free Usenet providers:
https://sybershock.com/#usenetA few interesting hierarchies:
comp.infosystems.gemini
alt.2600
alt.folklore.computers
sci.crypt
talk.politics.crypto
alt.sources.crypto
alt.os.linux
alt.cypherpunks
alt.security.pgp#Usenet #NetworkNews #NNTP #Retro #PlainText #ASCII #Smol #OldSchool