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 2,695,849 websites that are Prototype Customers. We know of 888,020 live websites using Prototype and an additional 1,807,829 sites that used Prototype historically and 338,560 websites in the United States.
Get a list of 2,695,849 websites using Prototype which includes location information, hosting data, contact details, 2,100,869 currently live websites which includes 1,212,849 domains that redirect to sites in the list. 1,807,829 sites that used this technology previously and 338,560 websites in the United States currently using Prototype.