"I can't believe it's taken me five years to get this posted. It's certainly a work in progress and missing lots of things, but it's a start. The key is a little missleading and, as the timeline gets closer to present, there is a lot of missing of areas. For example, Writing/Print includes phtoography and other visual media. Broadcasting includes all transmitted media (including the telegraph and telephone) and all massmedia (with the exception of print media), such as television and film. There are still, probably, a lot of mispellings, too."