Hot answers tagged usenet
The most widely-used is probably Google Groups, which describes itself as a "searchable archive of more than 700 million Usenet postings from a period of more than 20 years."
Do you know the Open-News-Network? They have Webnewsreaders. Not sure if it's what you're looking for.
There is something like NewsReader.com but its paid. Personally I have never tried it, so I cannot really recommend this site.
There seems to be no way but to manipulate the URL. The part of the URL after the last / is the group name. So to view the com.os.linux group, you would enter http://groups.google.com/forum/#!forum/comp.os.linux in the browser's address bar. If you're using Chrome, you could add a "search engine" that allows you to go straight to a Usenet group: ...
Google Groups doesn't sort posts or threads by oldest first. The topics view displays threads by the most recent first. The search results view has two sorting options, by relevance and by date, but by date is sorted by most recent first too. Maybe the next will help you: According to Get started with Usenet on Google Groups - Groups Help the oldest ...
You might have luck searching from another search engine, such as http://www.binsearch.info/ Unfortunately it only goes back 900 days, but perhaps that's enough?
If I understand your question, you want to read news such as Usenet News. One way to do that is to install software on your PC that directly connects to a NNTP server. There's a long list of such software at Wikipedia: "List of Usenet newsreaders" and Wikipedia: "Comparison of Usenet newsreaders".
I know that Marc Smith did research into analyzing and visualizing newsgroup activity while he was at Microsoft Research. I don't think it was a webapp, but it was called "Newsgroup Clouds". I have no idea how he gathered the data for analysis -- if he was subscribing to the feeds over time, or if he could analyze a new newsgroup on demand.
Google Groups let's you read and write to most newsgroups, give that a try.
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