Interesting subjects are how a GIS accomplishes feature filtering (we see here the checkboxes), feature  symbolization, zooming & panning (the 2nd view on the right is a zoomed part of the 1st), attribute table editing (see the table lower left where the user can directly intervene), scaling (notice the small frame  
upper right indicating the scale of the view, where we can fill in a desired scale & and the view will  
change automatically), etc.