RSS is a type of web feed which allows users and applications to access updates to online content in a standardized, computer-readable format. These feeds can, for example, allow a user to keep track of many different websites in a single news aggregator. - wikipedia
RSS was created around 1999, at that time I was in the Network Technologies program at North Seattle Community College. I didn't start using RSS myself till later. I used a variety of rss readers, the one that stuck with me the longest was Fever 1.39 . To use Fever you need a web server and a version of SQL I have access to both those things so in 2010 I started using Fever to aggregate all the sites I wanted to follow. Over the years this list has changed as sites disappear and as I became interested in other things. Fever was created by Shaun Inman he stopped supporting it in 2016 .
Another web service I started using around 2010 was Pinboard It is a service that lets you store links (url) to web pages you want to remember and return to. Pinboard has many good features one of which is generating an RSS feed from your list of links. Here is a feed of my links keep in mind you need to open this link in an RSS reader, its format is designed for a machine to read not a human. My account is public at Pinboard you can review all the link I have save, I am sure a physiatrist could make hay out of the list.