Escape key will cancel and close this dialog window.
Purpose: Displays relevant content recommendation based on the site usage pattern of all users of Mass.Gov. If Personalization is enabled (the default setting), your personal site usage pattern today and on prior visits to Mass.gov will be displayed to you and will also be a factor in determining personalized relevant recommendations for you.
There are some commercial and a few open source applications that would do that. Geographical Information Systems can take addresses and geocode them (determine latitude and longitude) and then display them on a thematic map that has geographical themes such as administrative boundaries, roads, census tracts, etc.
ESRI is the biggest name in GIS. There flagship is called ArcView. Several DBMS's, such as DB2 and PortGres, have geographic extensions which allow you to quesry based on points and polygons.
Some free stuff is the TigerLine data sets from the US Census that can do basic, but not highly accurate geocoding