| Subject | English | Spanish |
| commun., comp. | physical layer | capa física |
| commun., comp. | physical layer | capa PHY |
| comp., MS | physical layer | nivel físico (Layer one of the OSI model. A software layer that transmits bits from one computer to another and regulates the transmission of a stream of bits over a physical medium. This layer defines how the cable is attached to the network and which transmission technique is used to send data over the cable) |
| commun. | physical layer convergence protocol | protocolo de convergencia de capa física |
| el. | physical thickness of scattering layer | espesor físico de una capa difusora |
| IT | set of data link and physical layers | juego de capas físicas y de enlace de datos |