Handheld PDA devices are available in many different sizes, so another factor that you must consider when choosing which to purchase is which PDA devices feel comfortable to you and which do not. Some PDA devices are very tiny and difficult to handle, and some are very large and simply aggravating to keep with you. It is important that you choose a PDA device which feels comfortable to you, because you are going to end up handling a lot on a daily basis. The size of your PDA and the keyboard on your PDA are both extremely important aspects worth considering when purchasing your PDA.