DEFINING A SOCIAL NETWORK MODEL IMPLIED BY COMMUNICATIONS DATA

Systems and methods to define a social network for a user using data implied by communications of the user with others. In one embodiment, a method includes scanning messages to identify persons addressed in the messages; computing scores of the persons to determine a relevancy of each person; receiving, by a first computing device, a request from a computer program running on a second computing device; in response to the request from the computer program, providing access to friend data for the persons, the computer program to provide services based on the friend data; and sending the friend data to the second computing device.