The document discusses a proposed technology called the 5 Pen PC, which consists of 5 connected pens that each have a specific function: a CPU pen, communication pen, virtual keyboard pen, LED projector pen, and digital camera pen. The pens are connected wirelessly through Bluetooth and can connect to the internet through cellular connectivity. Together the pens allow for portable computing by projecting a keyboard and screen on any flat surface. However, the technology is still in development and has limitations like requiring a flat white surface and being expensive.