Multi-computing environment operating on a single native operating system

A computing device, comprising:

• a first video channel and a first input channel, for connecting to a first display device and a first input device for forming a first operating environment, wherein the first operating environment is used for booting the computing device;
• a second video channel and a second input channel, for connecting to a second display device and a second input device for forming a second operating environment;
• and
• an operating system;
• wherein when a plurality of applications run on top of the operating system, a process identifier (PID) of each of the plurality of applications is respectively associated with a corresponding operating environment selected from a group comprising the first operating environment and the second operating environment, wherein the operating system identifies a corresponding operating environment associated with each application according to the PID of the application so as to associate an execution of the application to a display device in the corresponding operating environment of the application respectively.