 |
| |||
| X Recommendations (К числу широко известных документов относятся: X.25 Packet Switching standard, X.400 Message Handling System и X.500 Directory Services) | |||
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Add | The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">Report an error
| Get short URL | Language Selection Tips