Google X may also refer to Google X Lab

Google X Lab

Google X Lab, sometimes referred to simply as Google X, is a secret facility run by Google thought to be located somewhere in the Bay Area of Nothern California....

, an innovation lab of Google.

Google X was a project released by Google Labs

Google Labs

Google Labs was a page created by Google to demonstrate and test new Google projects. Google calls Google Labs,Google also uses an invitation-only phase for trusted testers to test projects including Gmail, Google Calendar and Google Wave and many of these have their own "labs" webpages for...

 on March 15, 2005 and rescinded a day later. It consisted of the traditional Google

Google

Google Inc. is an American multinational public corporation invested in Internet search, cloud computing, and advertising technologies. Google hosts and develops a number of Internet-based services and products, and generates profit primarily from advertising through its AdWords program...

 search bar, but it was made to look like the Dock

Dock (computing)

The Dock is a prominent feature of the graphical user interface of the Mac OS X operating system. It is used to launch applications and switch between running applications...

 user interface

Interface (computer science)

In the field of computer science, an interface is a tool and concept that refers to a point of interaction between components, and is applicable at the level of both hardware and software...

 feature of Apple's Mac OS X

Mac OS X

Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

 operating system

Operating system

An operating system is a set of programs that manage computer hardware resources and provide common services for application software. The operating system is the most important type of system software in a computer system...

.
Google did not release any official statement as to why the project was shut down. Apple has patent

Software patent

Software patent does not have a universally accepted definition. One definition suggested by the Foundation for a Free Information Infrastructure is that a software patent is a "patent on any performance of a computer realised by means of a computer program".In 2005, the European Patent Office...

 protection covering the implementation of the Dock effect, together with trademark

Trademark

A trademark, trade mark, or trade-mark is a distinctive sign or indicator used by an individual, business organization, or other legal entity to identify that the products or services to consumers with which the trademark appears originate from a unique source, and to distinguish its products or...

protection for the graphical design elements of the Dock. Although Google X has been taken down, several mirrors stillexist.