Here is an interesting post we found in the Project Management Tips.

It lists an all-inclusive timeline of Project Management milestones starting by the development of the Gantt chart back in 1910s and ends with the publication of the third edition of  PMBOK® Guide in 2008… Enjoy reading it 🙂

BTW here is how the project would look like if Henry Laurence Gantt had a Merlin and a mac to use back then, was only interested in milestones and the future PMs had entered the actuals within… 😉

Click the screenshot to see it in real size…