DSP

Computing

• Digital signal processing, the study of signals in a digital representation and their processing methods
• Digital signal processor, a specialized microprocessor designed specifically for digital signal processing
• Dylan Server Pages, a web template engine using the Dylan language

Education

• Developmental Social-Pragmatic model, a developmental intervention for Autistic Spectrum Disorders
• Direct Support Professional, a US term for specialists in education of the mentally disabled

Military

• Defense Standardization Program, a standards program in the US military
• Defense Support Program, the U.S. Air Force early-warning satellites
• Special Presidential Division, an elite Zairean military unit charged with the protection of the president

Music

• Daesung Entertainment, a record label
• Deathlike Silence Productions, an independent record label in Norway
• dsp (group), an experimental electronic music collective

Politics

• Democratic Left Party (Turkey) - (Turkish: Demokratik Sol Parti, DSP)
• German State Party (Deutsche Staatspartei), a minor political party of the Weimar Republic period
• Democratic Socialist Perspective (Australia)
• Democratic Socialist Party (Japan)
• Democratic Socialist Party (Prabodh Chandra) (India)
• Democratic Socialist Party (Morocco)

Other

• Desmoplakin, a human gene which encodes a protein which forms intercellular junctions
• Dry Sterilisation Process, for the cold and fast sterilisation of surfaces
• Delta Sigma Phi, a social fraternity established in 1899
• Delta Sigma Pi, Co-ed business fraternity
• Deputy Superintendent in the Singapore Police Force
• DeadSpinosaur Productions, a small organisation creating animated shorts
• Deutscher Spiele Preis, a board games award in Germany
• Designated Suppliers Program, an anti-sweatshop standard used in some US universities
• Diarrheal shellfish poisoning, a type of shellfish poisoning.
• "Decessit sine prole", a Latin initialism used in genealogy to indicate that a person died without having children.