| Subject | English | Icelandic |
| math. | two-by-two frequency table | fjórfalda borð |
| math. | two-dimensional Poisson process | Poisson skógur |
| comp., MS | two-sided test | tvíhliða próf (A test in which the null hypothesis is rejected if the value of the test statistic falls into either tail of the probability distribution (i.e. is either less than a first critical value or greater than a second critical value)) |
| math. | two-stage least squares | almenn klassíska línuleg metla |
| comp., MS | two-step verification | tvíþætt staðfesting (An optional Microsoft account sign-in method with which users can only sign in by entering both a password and a security code sent to them by the Microsoft account team) |
| comp., MS | two-tailed test | tvíhala próf (A test in which the null hypothesis is rejected if the value of the test statistic falls into either tail of the probability distribution (i.e. is either less than a first critical value or greater than a second critical value)) |
| comp., MS | two-way matching policy | tvíhliða jöfnunarregla (A matching policy that requires one or more vendor invoice prices to match with one or more purchase order prices) |