Most large organizations use a variety of tools (and languages!) throughout. For example, odds are that BBC America uses a different set of tools than BBC prope

Most large organizations use a variety of tools (and languages!) throughout. For example, odds are that BBC America uses a different set of tools than BBC proper. I seem to remember they were using Drupal at one point too. It's not an national thing but simply because each group has its own requirements and - unless there is strict governance over tools - people choose different solutions for different tradeoffs and things drift.