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 2,995,841 websites that are Prototype Customers. We know of 838,393 live websites using Prototype and an additional 2,157,448 sites that used Prototype historically and 288,210 websites in the United States.
Get a list of 2,995,841 websites using Prototype which includes location information, hosting data, contact details, 838,393 currently live websites and an additional 650,380 domains that redirect to sites in this list. 2,157,448 sites that used this technology previously and 288,210 websites in the United States currently using Prototype.