GIS related word usage / charted from 1800 - 2000

I thought this was interesting, http://ngrams.googlelabs.com. It charts word usage as indexed by Google.

I have searched the following words and phrases:

• geography
• geographic
• information systems
• GIS
• CAD
• spatial data
• GPS

And here are the results as according to Google Labs Ngrams. 

http://ngrams.googlelabs.com/graph?content=geography,+geographic,+information+systems,+GIS,+CAD,+spatial+data,+GPS&year_start=1800&year_end=2000&corpus=0&smoothing=3