- Portability is the ability to transfer software or device technology equipment to systems from other manufacturers. In the case of open systems in accordance with international standards, portability of operating systems and components is independent of manufacturer.
- The term portability is also used in connection with telephone numbers and services. One speaks of number portability or service portability when one changes the network operator and can keep one's telephone number. This portability has been prescribed by the RegTP for both fixed network numbers and mobile network numbers.