Difficult | Operating System
| operating system | |
| comp., MS | operacinė sistema; operacinė sistema |
| IT | programų sistema |
| English thesaurus | |||
| |||
| dfclt; diffy | |||
|
Difficult : 5 phrases in 3 subjects |
| Chemistry | 2 |
| General | 2 |
| Government, administration and public services | 1 |