Columbia subject headings:
Gerontology--Congresses.
Older people--Employment--Congresses.
Older people--Services for--Technological innovations--Congresses.
Technological innovations--Social aspects--Congresses.
Harvard subject headings:
Gerontology--Congresses.
Older people--Employment--Congresses.
Older people--Services for--Technological innovations--Congresses.
Technological innovations--Social aspects--Congresses
Princeton subject headings:
Gerontology--Congresses.
Older people--Employment--Congresses.
Older people--Services for--Technological innovations--Congresses.
Technological innovations--Social aspects--Congresses.