| Subject | English | Catalan |
| comp., MS | card validation code | codi de validació de la targeta (A code that credit card companies use to authorize credit card charges. For example, American Express uses a four-digit number on the front of the credit card, and Visa, MasterCard, and Discover use a three-digit number on the back) |
| math. | cross-validation criterion | criteri de validació creuada |