Columbia subject headings:
Harvard subject headings:
Community health services--Management--Congresses.
Computer networks--Management--Congresses
Digital communications--Management--Congresses.
Nonprofit organizations--Technological innovations--Congresses.
Social networks--Management--Congresses.
Social structure--Management--Congresses.
Princeton subject headings:
Associations, institutions, etc.--Europe, German-speaking--Congresses.
Social service--Europe, German-speaking--Congresses.