# Recommendation X.402 (11/1988): Message handling systems: Overall architecture

> superseded recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q26985502](https://www.wikidata.org/wiki/Q26985502)  
**Source**: https://4ort.xyz/entity/recommendation-x-402-11-1988-message-handling-systems-overall-architecture