| Subject | English | Icelandic |
| math. | Bartlett relation | Bartlett tengslum |
| comp., MS | business relation | viðskiptatengsl (Any organization, person, or other legal entity with whom a company has significant interaction, such as sales or services) |
| comp., MS | item relation | vöruvensl (A reference to the item allocation group or the item and its product dimensions in a kanban rule) |
| math. | linear structural relation | línulega skipulag vegna |
| math. | reversible relation | afturkræf tengsl |