Here's why:
* Origin: The word "logistics" comes from the Greek word "logistikos," meaning "skilled in calculating."
* Meaning: It refers to the planning, organizing, and managing of resources, especially the transportation of goods and services.
Therefore, you would say:
* "The logistics of the event were complex."
* "We need to improve our logistics system."
If you want to refer to multiple systems or aspects of logistics, you would use "logistics systems" or "aspects of logistics" instead of making "logistics" plural.