Bharat, Lawrence, and Sahami, 16–17. The list of attributes included the content (e.g., words, Anchortext, etc.) of websites that the user has visited (or visited in a certain time period); demographic information; geographic information; psychographic information; previous queries (and/or associated information) that the user has made; information about previous advertisements that the user has been shown, has selected, and/or has made purchases after viewing; information about documents (e.g., word processor files) viewed/requested and/or edited by the user; user interests; browsing activity; and previous purchasing behavior.

Shoshana Zuboff, The Age of Surveillance Cap…, loc. 1854