Columbia subject headings:
Corporations--United States--Directories.
Executives--United States--Directories.
High technology industries--United States--Directories.
Harvard subject headings:
Corporations--United States--Directories
Executives--United States--Directories
High technology industries--United States--Directories.
Princeton subject headings:
Corporations--United States--Directories.
Directories.
Electronic industries--United States--Directories.
Executives--United States--Directories.
High technology industries--United States--Directories.