The DTD was replaced by the AN/PYQ-10 Simple Key Loader (SKL) which was built and designed by Ralph Osterhout and the Secure DTD2000 System (or SDS), a similarly sized unit that employs the Windows CE operating system.
Ralph Waldo Emerson | Ralph Lauren | Ralph Nader | Ralph Vaughan Williams | Ralph Fiennes | Ralph Steadman | Ralph Macchio | Ralph Bunche | Ralph Bakshi | Ralph Richardson | Ralph Stanley | Ralph McTell | Ralph Ellison | Ralph Jordan | Ralph | Ralph Abercromby | Ralph Molnar | Ralph Records | Ralph Peterson, Jr. | Ralph Klein | Ralph H. Fowler | Ralph Tresvant | Ralph Moore | Ralph Wilson | Ralph Terry | Ralph "Shug" Jordan | Ralph Peterson | Ralph Percy, 12th Duke of Northumberland | Ralph Inzunza | Ralph Darling |