Service Request Transport Protocol, GE-Fanuc automation protocol for programmable logic controller
BBC World Service | National Park Service | Internal Revenue Service | Distinguished Service Order | Special Air Service | United Parcel Service | Meritorious Service Medal (United States) | United States Postal Service | National Health Service | Meritorious Service Medal | Metropolitan Police Service | United States Forest Service | German Academic Exchange Service | Rail transport | International Air Transport Association | Secret Intelligence Service | Transmission Control Protocol | Immigration and Naturalization Service | Distinguished Service Cross | National Defense Service Medal | National Service | United States Secret Service | Total Request Live | Royal Naval Air Service | National Weather Service | File Transfer Protocol | Agricultural Research Service | Special Broadcasting Service | Session Initiation Protocol | Distinguished Service Cross (United States) |