| Subject | English | Catalan |
| environ. | acoustic filter A device employed to reject sound in a particular range of frequencies while passing sound in another range of frequencies | filtre acústic |
| comp., MS | client version filter | filtro de versió de client (Restricts the client versions that are used in a Lync Server environment) |
| environ. | filter cake Accumulated solids, wet or dry, generated by any filtration process, including accumulation on fabric filters in air filtering processes, or accumulation of wet solids in liquid filtering processes | producte de filtració |
| comp., MS | filter criteria | criteris de filtre (Conditions that users specify to limit which records are included in the result set of a query) |
| environ. | image filtering A remote sensing term related to image enhancement that refers to the removal of a spatial component of electromagnetic radiation | filtració d'imatge |
| comp., MS | Intelligent Message Filter | Filtre de missatgeria intel·ligent (The underlying technology of the Exchange Server content filter that evaluates inbound mail and assesses the probability that an inbound e-mail message is either a legitimate message or spam) |
| math. | Kalman filter | filtre de Kalman |
| comp., MS | key filter | filtre clau (A metadata column or field in a Key Filters control) |
| comp., MS | Key Filters | Filtres clau (A metadata navigation control that enables users to limit the items displayed in a list or library to those that match selected values) |
| comp., MS | Phishing Filter | filtre de pesca (A filter that helps to identify fraudulent Web sites and protect against personal data theft) |
| comp., MS | search filter | filtre de cerca (A term that can be added to a search to filter the results by a specific property (for example, by author). Relevant search filters appear under the search box in any open folder) |
| environ. | trickling filter A system of secondary sewage treatment which is similar to self-purification action of streams; it is more accurately a biological oxidizing bed; the effluent is placed on the stones in the bed and microorganisms present consume the solids as a food supply | biofiltre |