Dating..

"Computer dating" systems of the early-to-mid 20th century, especially popular in the 1960s and 1970s, before the rise of sophisticated phone and computer systems, gave customers forms that they filled out with important tolerances and preferences, which were "matched by computer" to determine "compatibility" of the two customers.

"Video dating" systems of the 1980s and 1990s especially, where customers gave a performance on (typically VHS tape) video, which was viewable by other customers, usually in private, in the same facility. Some services would record and play back videos for men and women on alternate days to minimize the chance that customers would meet each other on the street.

"Phone dating" systems of about the same vintage, where customers call a common voice mail or phone-chat server at a common local phone number, and are connected with other (reputed) singles, and typically charged by the minute as if it were a long-distance call (often a very expensive one). A key problem of such systems was that they were hard to differentiate from a phone porn service or "phone sex" where female operators are paid to arouse male customers, and have no intention of dating them, ever.

Online dating services of the 1990s and today, which may incorporate a form-, video-, or audio-/phone-based component, integrating them into a single "profile" and providing multiple means to communicate (including the telephone).