Own fields are 5 of text fields, numeric fields, date fields and checkboxes where additional individual information (that don't match any other field) can be stored for each contact. This can be for example the date when met the first time.

 

Individual fields of a contact

 

The titles of the fields can be renamed to individual ones in the localization module.

The content of the individual fields can be printed in project documents, reports and can be displayed in contact list views.