Although electronic whiteboards come in several sizes and shapes, their main function is the same – to capture written annotations, notes and drawings and store them for future reference. This is accomplished with infrared sensors, radio-signal-emitting pens, plasma overlays and other technologies. The end product is a file of digitally stored notes that can be e-mailed, posted online, or printed and handed out to an audience immediately after a presentation or training session. Beyond these basic features, some electronic whiteboards are interactive – letting you connect a computer and projector to the whiteboard to combine its features with common software programs. A Microsoft Excel spreadsheet, for example, can be projected onto an interactive whiteboard where it can be marked up with colored pens to highlight important numbers or trends. Or, using an interactive whiteboard's touchscreen feature, a presenter can navigate the Web using a finger to move the cursor and double-clicking with taps on the screen. Even videoconferencing functions have been integrated into electronic whiteboards in the past year.
Regenold, Stephen. Presentations (2003). Articles>Education>Multimedia>Videoconferencing