# closed system

> does not allow certain types of transfers (such as transfer of mass) in or out of the system

**Wikidata**: [Q1468684](https://www.wikidata.org/wiki/Q1468684)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Closed_system)  
**Source**: https://4ort.xyz/entity/closed-system


## References

1. Freebase Data Dumps. 2013