[support] sub-sections for content types

Hi, I am using drupal 6.x. I need to implement the following on my website. I have a section called news. Now, withing News section, I need to sub-divide it into various sections e.g. banking sector, hospitality sector, food chain, etc. Users can browse through the news according to the sections they are interested in or view all the news items. How can this be achieved? Couple of possible ways we have been identifying are 1) A module to create sub-sections, then the user can be presented with a list of sections to choose from. 2) Set up tags such that all the news will be tagged and users can select from the tags. Any way to implement this? Or any other way the idea can be implemented? With Regards, Mehul Ved.