[1] Digital Research - Software-Hersteller, u.a. des MSDOS Clones DRDOS

[2] Delivery Reports (unter X.400)

[3] Deactivate Request (C/I channel code)

[4] Data Ready

[5] Data Receive(r)

[6] Data Record(er)

[7] Data Reckoning

[8] Data Requirement (->"NASA Acronym List")

[9] Discrepancy Report (->"IEEE Standard Dictionary") (->"NASA Acronym List").