| Subject | English | Spanish |
| commun., IT | common functional specifications | especificaciones funcionales comunes |
| IT | functional and technical specification | especificación funcional y técnica |
| telecom. | functional interface specification | especificación de interfaz funcional |
| comp., MS | functional specification | especificación funcional (A document that describes a solution, product feature set, or other final project deliverable in explicit detail. It includes the conceptual, logical and physical designs) |
| commun. | functional specification | especificación funcional |
| el. | functional specification block | bloque de especificación funcional |
| el. | functional specifications and description language | lenguaje de especificación y descripción funcionales |
| bank. | user detailed functional specifications | especificaciones funcionales detalladas para los usuarios |
| bank. | user detailed functional specifications | UDFS |