Because "PDA software download" could refer to a few very different topics, could you clarify which one you are looking for?
: Downloads for Phase Doppler Anemometry (PDA) tools used in fluid dynamics and particle research (e.g., Dantec Dynamics ). pda software download
: Mobile software used for Resident Case Logs or Field Asset Management (often still called "PDA software" in technical manuals). Because "PDA software download" could refer to a
: Finding drivers or sync software (like Palm Desktop or ActiveSync) for old-school handhelds like Palm Pilots , Sony Cliés , or HP iPAQs . pda software download
Which of these fits what you're looking for, or are you thinking of something else entirely?