SPD Technology Abbreviation

Serial Presence Detection

Serial Presence-Detect

Society for The Physically Disabled

Spray Pyrclysis Deposition

Spreader

A streamline metal block placed in the path of flow of the plastic material in the heating cylinder of extruders and injection molding machines to spread it into thin layers, thus forcing it into intimate contact with the heating areas.

State Purchasing Division

Supplementary Planning Document

Supplementary Provisioning Data

Supply, Processing, and Distribution

Symmetric and Positive Definite