Editing SPD (disambiguation) (section)

==Science and technology==
* [[Suspended Particle Device]], glass or plastic with electrically variable light transmission
* [[Shimano Pedaling Dynamics]], clipless bicycle pedals
* [[Spectral power distribution]], of light
* [[Surge protection device]], for electrical voltages
* [[Severe plastic deformation]]
* [[Symmetric positive definite]], in linear algebra
* [[Short-path distillation]]
* Spin Physics Detector, a component of the planned [[Nuclotron-based Ion Collider Facility|NICA particle accelerator]] near Moscow, Russia

=== Computing ===
* Security Policy Database, rules in an IPsec implementation, for example in a [[High Assurance Internet Protocol Encryptor]]
* [[Serial presence detect]], a method to access memory module information
* [[SharePoint Designer]], an interface for designing in Microsoft SharePoint
* [[Short Payment Descriptor]], a compact textual data format (a MIME/file type) for an easy exchange of a payment information, using smart phones or NFC devices; a standard for [[QR code payments]]
* SPD (Systems Product Division) bus, an I/O bus used in the [[IBM 9370]] and [[IBM AS/400]] systems.

===Medicine===
* [[Schizoid personality disorder]], a personality disorder
* [[Sadistic personality disorder]], a personality disorder
* Split personality disorder, an alternative name for [[dissociative identity disorder]], a mental disorder.
* [[Semantic pragmatic disorder]], a pervasive developmental disorder
* [[Symphysis pubis dysfunction]], pelvic joint pain during pregnancy or childbirth
* [[Sensory processing disorder]]
* [[Sterile processing department]], where surgical instruments are sterilized
* [[Salmon poisoning disease]]