Newsgroup hierarchies make it easy to make sense out of all the different options on Usenet. They allow you to narrow down the subject of the newsgroup to the extent that it is generally pretty obvious what posts would be relevant to the topic at hand and which would not.
SFV stands for Simple File Verification and provides you with a way to make sure that the file you downloaded is not damaged. Learn about SFV in this article.
Usenet technology can propagate the posting of anyone around the world in a very short amount of time, oftentimes within a day. This system is decentralized and relies on a network of servers that share information with one another at regular intervals.
If you're familiar with any of the Internet discussion groups, which are usually referred to as forums, you're familiar with the basic idea of a USENET newsgroup. In fact, the design of Internet forums owes a lot to newsgroups.