Yahoo! Pipes was a web application from Yahoo! that provided a graphical user interface for building data mashups that aggregate web feeds, web pages, and other services; creating Web-based apps from various sources; and publishing those apps. The application worked by enabling users to "pipe" information from different sources and then set up rules for how that content should be modified (for example, filtering). In addition to the pipe editing page, the website had a documentation page and a discussion page. The documentation page contained information about pipes including guides for the pipe editor and troubleshooting. The discussion page enabled users to discuss the pipes with other users. History Yahoo! Pipes was released to the public in beta on 7 February 2007. It was built by Pasha Sadri, Ed Ho, Jonathan Trevor, Ido Green, and Daniel Raffel of Yahoo! It is described by its creators as: On 4 June 2015, it was announced that Pipes would be in read-only mode from 30 August 2015, and shut down on 30 September 2015. Yahoo did not offer a paid version, but instead shut down the program entirely. Purpose The purpose of Yahoo! Pipes was to create new pages by aggregating RSS feeds from different sources. Yahoo! Pipes had many modules which could be used either to grab data from sources or to edit the data that was grabbed from the sources. These modules were grouped into categories: sources, user inputs, operators, URL, string, date, location, and number. Creating and editing a Pipe To create or edit a pipe, the user had to sign up with a Yahoo! ID. Creation and editing of the pipes was completely online; the user didn't have to download a plug-in, program or app. The user selected the "Create a pipe" option to open the Pipe Editor. The pipe editor was composed of three panes: the canvas, the library, and the debugger. The pipe was created using these panes. After creation, the pipe was saved and run. The user was then able to give a name and short description to the pipe. If the creator of the pipe decided to publish the pipe, it would become visible for everyone. Other users had the ability to clone the pipe, which they could then edit for their own use. The Canvas The canvas was the main pane where the editing of pipes was done. It was in the center of