Amazon.com started its eBookStore in November 2000, following a partnership with Microsoft in August 2000 to sell digital books for the Microsoft Reader. The same month, Amazon.com also partnered with Adobe to offer digital books for the Acrobat Reader and the Glassbook Reader - Adobe had just bought Glassbook, its reader and its digital bookstore. In April 2001, Amazon.com partnered again with Adobe to include in its collection 2,000 copyrighted books for the Acrobat eBook Reader, mainly titles from major publishers, travel guides, and children books. December 2000 > Gyricon Media, to develop an electronic ink technology In December 2000, researchers at PARC (Palo Alto Research Center), the Xerox center in Silicon Valley, California, founded the company Gyricon Media to market the SmartPaper, an electronic paper based on the display technology called gyricon - developed since 1997 within Xerox. Very briefly explained, the technology was the following one: in between two sheets of flexible plastic, millions of micro-cells contain two-tone (for example black and white) beads suspended in a clear liquid. Each bead has an electric charge. An external electrical pulse makes the balls rotate and change color, to display, modify, or delete data. In 2004, the market was commercial advertising, with small posters running on batteries. The company ended its activities in 2005, with R&D activities going on at Xerox. 2000 > The wiki, a collaborative website Deriving from the Hawaiian term "wiki" ("fast"), a wiki is a website allowing multiple users to collaborate online on the same project. The wiki concept became quite popular in 2000. At any time, users can contribute to drafting content, edit it, improving it, and updating it. The wiki has been used for example to create and manage dictionaries, encyclopedias, or reference tools. The software can be simple or more elaborate. A simple program handles text and hyperlinks. With a more elaborate program, one can embed images, charts, tables, etc. The most famous wiki is Wikipedia. January 2001 > Wikipedia, a global free cooperative online encyclopedia