system virtual space

virtual 3-D space

virtual address space

mapping between the operation space and pattern space

separating dry space from moist space

2D virtual environment

2D virtual environment simulation

3D fashion virtual

3D sight virtual model

3D virtual borehole core images

3D virtual environments

3D virtual experiment

3D Virtual Globe

3D virtual human

3D virtual human model

3D virtual mine

3D virtual reality

3-D virtual road

3D virtual roadway sights