Like the smartphone, the zoom-in zoom-out function should be free, but this model is not. A big update is needed. In order to read pdf, this zoom-in zoom-out function must be able to be fast. It is very uncomfortable to use the finger to specify the area for enlarging the screen. It should be able to zoom out easily and comfortably like a smart phone. And if you connect only computers without an application, many people will use it to send and receive data. Using the application itself is very inconvenient. Since ram is 4 gigas, rp1 is expected to be faster than onimax2. In order to be faster, massive operation of the program is inevitable. And a system upgrade is necessary to create documents using a Bluetooth keyboard or mouse. If this update succeeds, all students and executives around the world will buy dpt-rp1 and sony will be able to accumulate tremendous wealth. The lack of response from the pen when writing for the first time is also a problem, and a system update to the pen is required. We should operate Notepad or Word program by using Bluetooth keyboard or Bluetooth mouse. DPT-RP1 must allow the use of a Bluetooth keyboard or mouse. And it shoud have Word program, memo program by not touching, using keyboard or mouse. Also dpt-rp1 necessarily needs dictionary of english or chinese or japnese... etc for students.