Session Description Protocol 
Software Development Plan 
Sockets Direct Protocol 
Service Discovery Protocol 
Service Data Point 
Service Delivery Point 
Science Data Processing 
Social Democratic Party 
Standard Data Processor 
Safety Data Package 
Savings Deposit Program 
School Development Plan 
Service Delivery Platforms 
Service Discovery Profile 
Severely Disturbed Period 
Shared Development Process 
Shuttle Data Processor 
Signal Data Processor 
Site Data Processor 
software development project 
STEYR-DAIMLER-PUCH 
Streaming Data Procedure 
Submission and Delivery Protocol 
Sudanese Pound 
Supplier Data Package 
SAR Data Provider 
Science Data Plan 
Service Delivery Platform 
Service Directory Point 
Simple Discovery Protocol