title: Are RFID/NFC tags and readers compatible? or manufacturer dependent?
body: <p>Are RFID and NFC cards "universally" readable by RFID and NTC readers of the same format/standard? or do they have to be same brand/manufacturer kind of thing as one guy told me?</p>
  
  <p>trying to get into this RFID /NFC thing</p>
  
  <p>regards</p>