 |
| maintenance: 436 phrases in 43 subjects |
| Aviation | 39 |
| Coal | 3 |
| Communications | 98 |
| Computers | 13 |
| Construction | 1 |
| Corporate governance | 2 |
| Data processing | 1 |
| Earth sciences | 2 |
| Economy | 2 |
| Education | 1 |
| Electronics | 9 |
| Environment | 5 |
| Finances | 5 |
| General | 22 |
| Health care | 2 |
| Human resources | 4 |
| Industry | 8 |
| Information technology | 46 |
| International Monetary Fund | 1 |
| International trade | 1 |
| Labor law | 4 |
| Labor organization | 1 |
| Life sciences | 2 |
| Lighting other than cinema | 1 |
| Materials science | 4 |
| Mechanic engineering | 1 |
| Medical | 1 |
| Microsoft | 15 |
| Military | 18 |
| Name of organization | 2 |
| Natural resourses and wildlife conservation | 1 |
| Nuclear physics | 1 |
| Patents | 15 |
| Politics | 5 |
| Rail transport | 3 |
| Reliability | 30 |
| Statistics | 3 |
| Technology | 9 |
| Telecommunications | 9 |
| Textile industry | 1 |
| Transport | 41 |
| United Nations | 3 |
| Work flow | 1 |