| Subject | English | Spanish |
| environ. | library service | servicio de biblioteca |
| environ. | library service The duties of an establishment, or a public institution, charged with the care and organizing of a collection of printed and other materials, and the duty of interpreting such materials to meet the informational, cultural, educational, recreational or research needs of its clients | servicio de biblioteca |
| work.fl., commun. | library services | servicios bibliotecarios |
| work.fl., commun. | library services | medios de informaciones bibliotecarias |
| patents. | library services | servicios de bibliotecas |
| gen. | mobile library services | servicios de bibliotecas ambulantes |
| polit. | On-site and Online Library Services Unit | Unidad de Biblioteca en Sala y en Línea |