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 2,968,968 websites that are Prototype Customers. We know of 744,671 live websites using Prototype and an additional 2,224,297 sites that used Prototype historically and 258,491 websites in the United States.
Get a list of 2,968,968 websites using Prototype which includes location information, hosting data, contact details, 744,671 currently live websites and an additional 600,466 domains that redirect to sites in this list. 2,224,297 sites that used this technology previously and 258,491 websites in the United States currently using Prototype.