TRVL is a portable PC for travelers. Travelers can get new travel experience by using TRVL. This PC contains everything travelers need to carry. The main functions of TRVL are 1. map/ navigation, 2. Guide, 3. ID/ passport, 4. ticket/ schedule, 5. TV phone/ e-mail, 6. Camera/ video. The navigation and guide function is the most innovative function of TRVL. These functions show the information of the environment by navigating and guiding on the transparent display, which means people can get the information about what they are looking at through the transparent display. This is much faster and more efficient way than using a map, a guidebook or a navigating system in smart phone. People can travel easily, efficiently and joyfully by using TRVL. People can travel easily, efficiently and joyfully with TRVL.