Prototype is a javascript framework which aims to ease development of dynamic web applications.
http://www.prototypejs.org
JavaScript Libraries and Functions · JavaScript Library
Get access to data on 2,719,820 websites that are Prototype Customers. We know of 818,775 live websites using Prototype and an additional 1,901,045 sites that used Prototype historically and 298,838 websites in the United States.
Get a list of 2,719,820 websites using Prototype which includes location information, hosting data, contact details, 818,775 currently live websites and an additional 821,235 domains that redirect to sites in this list. 1,901,045 sites that used this technology previously and 298,838 websites in the United States currently using Prototype.