If one clicks Forums at the top of any page one is taken to a page listing all of them and to get to the main index for Business and Consumer is easy - just click the image.
But that doesn't work for the 2 images below, Security Awareness & Japan Corporate.
So one can only go to an individual forum in those sections and work backwards to get to the section's main index page.
The images shown below when clicked merely open up....as images. I've reported this about a year ago I think so this is just a reminder.