This document discusses dRuby and its use for distributed and web-based programming. Some key points include: - dRuby allows Ruby objects and code to be distributed across multiple processes and computers in a simple way without limitations of Ruby. - It can be used for background processing in Rails applications, building distributed services like fax transmission programs, and more. - Techniques like Rinda tuple spaces can be used for distributed processing with dRuby. Overall, dRuby enables creating distributed applications and services in an easy way using the Ruby language.