| OF | |
| abbr. f.trade. | orange flake |
| abbr. oil | ocean freight; oceanographic facility; oil-fired; open fracture |
| abbr. textile | olefin fiber; ooze finish; open fabric; open flame; Oxidationsfarbstoff |
| Free Open Source Software | |
| softw. abbr. | FOSS |
|
solution : 8 phrases in 4 subjects |
| Abbreviation | 4 |
| Chemistry | 1 |
| Nanotechnology | 2 |
| Software | 1 |