Timeline - a graphic overview of the events in the history of data visualization that the authors call "milestones".
Milestones in the History of Thematic Cartography, Statistical Graphics, and Data Visualization are shown in the the form of an interactive timeline. The timeline is divided into two vertical sections. You can drag each section left or right to see milestones of different time periods. You can also click one of the links at the bottom of the timeline to jump to a particular epoch.
Each of the milestone's in the timeline can be clicked to reveal its summary that includes both a link to its full details and a category to which it belongs. The category can also be clicked to initiate a search of other milestone's based on that category[from zlwise].
But the web page is much more than this: comprehensive work of dedicated people over decades. Last project has been granted by National Sciences and Engineering Research Council of Canada.
Friendly, M. & Denis, D. J. (2001). Milestones in the history of thematic cartography, statistical graphics, and data visualization. Web document, http://www.datavis.ca/milestones/. Accessed: February 8, 2012