“5 pen technology :A Review” is a recent innovation in the area of pen computing. Pen computer is a field that outline computer like user interface that makes use of pen like devices that will be suitable to use in evaluation to modern systems (such as laptops, desktops etc.).5 Pen PC technology consists of 5 pen like devices which are used for providing functions of a CPU, a projector, a virtual keyboard, a camera, and communication functions of a cellular phone. All the 5 pens are connected to each other via wireless technology if possible Bluetooth i.e. 802.11 BG .The whole set of 5 pen technology is connected to the internet via the cellular phone pen.5 pen PC technology is also known as P-ISM i.e. Pen-style Personal Networking Gadget Package. Keywords— P-ISM ,display , camera ,CPU pen , Battery ,Virtual Keyboard ,Bluetooth , Wireless Connectivity , etc.