Released in 1994, the optimistically named “DeskTop Replacement 1” is an early pen-based, mobile computer. Like the NCR 3125 3 years earlier it’s a PC that you can carry in your hand and that you can operate using a pen as a mouse. Of course, the DTR-1 used updated hard- and software, but the idea is the same. Therefore, the architecture of these devices did not allow much freedom and required a desktop-class performance CPU. As a result, all these devices are the most heavy mobile pen computers with a weight almost twice as much as the one of an Apple Newton or a Magic Cap-based PDA. Not only were they heavy, the PC architecture also meant that the price was double or triple the price of a Newton or a Magic Cap device (a similar problem exist nowadays
in a lesser form for Windows-based tablets as opposed to Android-based tablets). The upside of the used PC architecture was that it sported all the standard interfaces also found on desktop PCs.