|
messaging service : 22 phrases in 12 subjects |
| Communications | 1 |
| Computer networks | 5 |
| Electronics | 1 |
| Household appliances | 1 |
| Information technology | 2 |
| Internet | 1 |
| Microsoft | 1 |
| Military | 1 |
| Mobile and cellular communications | 1 |
| Programming | 1 |
| Technology | 2 |
| Telecommunications | 5 |