In WordPress an RSS feed can easily be added and by default it will show all the blog posts. I however wanted to have an RSS feed only containing blog posts of a specific category. Since I couldn’t easily find it on wordpress.com I googled around a bit and these are my findings.

1. You can go to the RSS feed of a blog by simply appending “/feed/” to the url like this:
   https://bjornhouben.wordpress.com/feed/
2. If you want an RSS feed of a blog containing only blog posts in a specific category, append
   “/category/<category name>/feed/” to the url like this:
   https://bjornhouben.wordpress.com/category/Microsoft/feed/
3. If you want an RSS feed of a blog containing only blog posts with a specific tag, append
   “/tag/<tag name>/feed/” to the url like this:
   https://bjornhouben.wordpress.com/tag/ICT/feed

For even more options, take a look at this great article:
http://codex.wordpress.org/WordPress_Feeds