The easiest way is to download and install an RSS reader, which is an application that collects data in RSS format. Modern web browsers, like Firefox, Opera and Safari, have built-in RSS support.
There are also various web services that compile RSS feeds, for example Bloglines.
You can subscribe to news from NAI's website through RSS. Follow the instructions of your RSS client and use the links below.
Please note that all feeds may contain information both in English and in Swedish.
More information on RSS and on how it works is to be found for example at Wikipedia.