Handheld Learning - learning with mobile and ubiquitous technologies

Hi can anyone help me please I am trying to persuade my college to take on a PDA or something so that students who have problems hearing or with SEN can get the lecture etc notes into written format?  I saw something being used in a student many years ago before I became a teacher so didn't think to take on the information. I would like pointers as to which PDA and what software - many thanks for your help

Adele