Columbia subject headings:
Harvard subject headings:
Communication--Technological innovations--Congresses
Older people--Services for--Technological innovations--United States--Congresses.
Older people--United States--Attitudes--Congresses.
Princeton subject headings:
Communication--Technological innovations--Congresses.
Older people--Services for--United States--Technological innovations--Congresses.
Older people--United States--Attitudes--Congresses.