What is actually meant by personal data?

Personal data is any kind of information that can be linked to a living person. This might for example be your name, address and personal identity number. Photos of people are also classified as personal data. In fact, even sound recordings that are stored digitally can constitute personal data even if no names are mentioned in the recording. A corporate identity number is not personal data but may be in the case of a one-person company. A car's registration number may constitute personal data if it can be linked to a natural person.