Difficult | Operating System
| Operating System abbr. | |
| IT | operativsystem |
| operating system abbr. | |
| comp., MS | operativsystem; operativsystem |
| econ. | driftssystem |
| English thesaurus | |||
| |||
| dfclt; diffy | |||
|
Difficult : 21 phrases in 9 subjects |
| Chemistry | 2 |
| General | 1 |
| Government, administration and public services | 1 |
| Labor law | 3 |
| Law | 2 |
| Life sciences | 2 |
| Marketing | 1 |
| Medical | 6 |
| Transport | 3 |