Conventionally, a user would be online and using an app to read/write data from/to the PDA. The PDA user would be the initiator of this data i/o process. In a contracted PDA, the initiator of the data exchange would be the business or organization, aka not the user of the PDA. This is in cases where pDAs are used, for example, for HR purposes where companies would need access to store and access their employee records, or for medical records where medical staff can update records on a PDA.