Windows Contacts was a contact manager that was included in Windows Vista, Windows 7, Windows 8. It replaced but retains most of the functionality of Windows Address Book and worked with Windows Live Mail and the Vista version of Windows Mail.
Windows Contacts used an XML-based schema format. Each contact appeared as an individual .contact file, in which custom information including pictures can be stored. Windows Contacts features extensibility APIs for integration with other applications and for storing custom information. The legacy *.wab format and the open standards *.vcf (vCard) and *.csv (CSV) are also supported.