The third-party reseller exhibiting for Zenith at the show found the use of a wireless keyboard complete with a joystick a handy means of controlling the PC to call up files or to log onto the Internet. The ease of displaying VCR content is a benefit of the Zenith approach. There is an evolution away from blackboards in the classroom. Acer America Corp's EduCart product is a cart fully equipped with camera, projector, document camera, network-accessible computer and interactive software. The whiteboard becomes the computer screen by using a conventional computer-driven projector.
Projection also provides a control panel on the whiteboard for keyboard and mouse emulation.
Tapping the projected control panel with an ordinary erasable marking pen has the effect of keyboard strokes and mouse clicks. The system's camera tracks the location of the pen taps. Accessing multimedia content off the Internet is done in the same way. If the classroom is connected to a content or administration server in the school, announcements or home-grown content can be projected. The document camera enables the projection of images from books, magazines and newspapers, as well as images of works of art - even of 3D objects.