There are a couple add-ons available in the market today that would allow the touch screen functionality to be added to a standard laptop. Of course this does not change the design to allow the tablet mode that true touch screen laptops are capable of, but still some add-ons are worthy of mention. Of these products is the DuoSense released by N-Trig. It is currently, arguably, the leader in digitizers that offer multi-touch capability.
The device fits over your computer screen and using a stylus or your finger, the software will force your operating system to work as if it were a touch screen laptop. Dragging and dropping folders and files with your finger or stylus is now possible as is composing handwritten emails and documents or drawing directly onto the screen to emphasize a point during a presentation. However, because it does not change the fact that a standard laptop cannot induce full tablet mode, some of these features are limited in usability by ergonomics.
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