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'''Dynamic Debugging Technique''', or '''DDT''', was the name of several [[debugger]] programs originally developed for [[Digital Equipment Corporation|DEC]] hardware, initially known as '''DEC Debugging Tape''' because it was distributed on [[paper tape]]). The first version of DDT was developed at [[MIT]] for the [[PDP-1]] computer in [[1961]], but newer versions on newer platforms continued to use the same name. After being ported to other vendor's platforms and changing media, the name was changed to the less DEC-centric version.
DDT is closely related to [[Octal Debugging Technique|ODT]]. Both names were used for several different debuggers, but generally debuggers with the ODT name had more limited capabilities than DDT debuggers.
As with other DEC tools, early [[CP/M]] kept the DEC name DDT for its debugger. DDT was later superseded by [[Symbolic Instruction Debugger|SID]].
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