Information and communications technology (ICT) is often used as an extended synonym for information technology (IT) but is a more specific term that stresses the role of unified communications and the integration of telecommunications (telephone lines and wireless signals), computers as well as necessary enterprise software, middleware, storage, and audio-visual systems, which enable users to access, store, transmit, and manipulate information. The term ICT is also used to refer to the convergence of audio-visual and telephone networks with computer networks through a single cabling or link system. There are large economic incentives to merge the audio-visual, building management and telephone network with the computer network system using a single unified system of cabling, signal distribution and management.