They can also serve as [[barcode reader]]s, and they are used in large stores, warehouses, hospitals, or in the field, to access a [[database]] from a remote ___location. Others have a touch screen, IrDA, Bluetooth, a memory card slot, or one or more data capture devices.
PDT'sPDTs frequently run wireless device management software that allows them to interact with a [[database]] or [[software]] [[Application software|application]] hosted on a [[server (computing)|server]] or [[mainframe computer]].<ref>List of [http://www.bitpipe.com/tlist/Mobile-Device-Management-Software.html Bitpipe] whitepapers on wireless device management.</ref>
Boundaries among [[Personal digital assistant|PDA]], [[smartphone]] and EDA can be blurred when comparing the wide array of common features and functions. EDAs attempt to distinguish themselves with a pre-defined requirement for long term constant daily operation (Normallynormally allowing a minimum of 8 hours). They seek a higher than normal [[toughness|impact rating]] / drop test rating and an [[ingress protection]] rating of no less than [[IP Code|IP54]],. Most have at least one Datadata Collectioncollection function, i.e.g. a [[Barcodebarcode]] or [[RFID]] Reader etcreader.
