If we were still forced to exchange business cards or note appointments in a calendar in the past, these tasks of making contact and administration have long since been dematerialized. PDI (Personal Data Interchange) is an important tool for interaction and exchange between two people in a professional or private context. .vcs files are used among other things for the transfer and synchronization of appointments and their details.
vCalendar was the industry standard for exchanging appointment information, which has since been replaced by iCalendar. vCalendar files have the .vcs file extension and are compatible with many digital calendars.
