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 2,844,962 websites that are Prototype Customers. We know of 775,910 live websites using Prototype and an additional 2,069,052 sites that used Prototype historically and 275,449 websites in the United States.
Get a list of 2,844,962 websites using Prototype which includes location information, hosting data, contact details, 775,910 currently live websites and an additional 718,518 domains that redirect to sites in this list. 2,069,052 sites that used this technology previously and 275,449 websites in the United States currently using Prototype.