 |
| |||
| masked character (ssn) | |||
| masked: 151 phrases in 15 subjects |
| Abbreviation | 110 |
| Aviation | 1 |
| Computer networks | 1 |
| Computers | 1 |
| Electronics | 8 |
| Information technology | 8 |
| Mass media | 2 |
| Medical | 1 |
| Military | 3 |
| Physiology | 1 |
| Programming | 11 |
| Religion | 1 |
| Software | 1 |
| Sports | 1 |
| United States | 1 |