| Subject | English | Icelandic |
| comp., MS | C corporation | C-hlutafélag (An United States tax law designation given to any corporation that is a unique entity apart from and taxed separately from its owners) |
| math. | Gram-Charlier series type C | Gram-Charlier röð tegund C |
| math. | Hoeffding C1 statistic | Hoeffding C1 tölfræði |
| math. | type C distribution | gerð C dreifing |
| math. | type C region | gerð C svæði |
| math. | type C series | gerð C-deild |