The term "DSP", when used by itself, can refer to:

• The science and engineering discipline of digital signal processing.
• The microprocessor class of digital signal processors.
• The U.S. Air Force Defense Support Program early-warning satellites.
• The German State Party (Deutsche Staatspartei), a minor political party of the Weimar Republic period.
• One of several (unrelated) political parties called the Democratic Socialist Party:
  • Democratic Socialist Party (Australia)
  • Democratic Socialist Party (Japan)
  • Democratic Socialist Party (Prabodh Chandra) (India)

In the form dsp or d.s.p. this abbreviation can stand for the Latin phrase decessit sine prole ("died without issue"). This often appears in genealogical tree-diagrams.

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