SDD

SDD may refer to:

• Software Design Description (IEEE 1016–2009), a standard that specifies the form of the document used to specify system architecture and application design in a software-related project
• Software Design Document, a written outline of the development of a course or a description of a software product
• Solution Deployment Descriptor, a proposed OASIS standard for software deployment, configuration and maintenance
• Software Design and Development, an HSC subject in NSW that details the basics of designing and developing software applications
• Syntax-Directed Definition - a context-free grammar with attributes and rules
• Sentential Decision Diagram, a formalism in knowledge compilation and artificial intelligence

• SDD, for SEPA Direct Debit, a payment system in the Single Euro Payments Area in Europe
• SDD, ISO code for the Sudanese dinar, the currency of Sudan 1992–2007, now replaced by the Sudanese pound

• Sulfadimidine, an antibiotic whose abbreviations include SDD
• Shared delusional disorder, a psychiatric syndrome
• Silicon drift detector, a p-n junction-based detector for ionizing radiation, such as for X-rays
• Seasonal deficit disorder, another name for seasonal affective disorder
• Symmetric diagonally dominant matrix systems in mathematics
• Selective decontamination of the digestive tract in medicine

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