Katherine Parker: Never burn bridges. Today's junior *adnetork*, could be tomorrow's senior DSP!

Thanks to all who have contacted me with feedback - all very useful as I like to employ "expert crowdsourcing". The one thing that is guaranteed when you put 192 logos in 24 categories on a page is that it will be wrong. Many companies operate across categories and companies are different within categories. I tried to put companies in the box which reflects their primary existing business model (and only one box per company - with a couple exceptions as examples). I recognize that some companies are "repositioning" to different functionality which doesn't get reflected with my methodology. There will undoubtedly be revisions going forward. Thanks for your understanding.