Abstract: A computer activity-based challenge may be posted by a computer system to a social network associated with a user of the computer system. A notification may be received from the social network by the computer system indicating acceptance of the challenge for each subscriber of the social network who accepts the challenge. A result obtained by each subscriber who accepted the challenge may be recorded by the computer system after receiving the result from the social network. In some implementations a value associated with the challenge may be updated using dynamic scoring.

Abstract: A server transmits location information based on identification information of at least one access point in response to the reception of the identification information, the time of reception of identification information of an access point that is associated with a location indicated by the location information received from the server is associated with the indicated location, irrespective of the time of reception of the location information. Identification information of an access point is received and is associated with reception time information that indicates the time of reception of the identification information. The identification information associated with the reception time information is transmitted to a location information providing server. Location information based on the transmitted identification information is received and is associated with reception time information that is associated with the transmitted identification information.

Abstract: A server transmits location information based on identification information of at least one access point in response to the reception of the identification information, the time of reception of identification information of an access point that is associated with a location indicated by the location information received from the server is associated with the indicated location, irrespective of the time of reception of the location information. Identification information of an access point is received and is associated with reception time information that indicates the time of reception of the identification information. The identification information associated with the reception time information is transmitted to a location information providing server. Location information based on the transmitted identification information is received and is associated with reception time information that is associated with the transmitted identification information.

Abstract: A computer activity-based challenge may be posted by a computer system to a social network associated with a user of the computer system. A notification may be received from the social network by the computer system indicating acceptance of the challenge for each subscriber of the social network who accepts the challenge. A result obtained by each subscriber who accepted the challenge may be recorded by the computer system after receiving the result from the social network. In some implementations a value associated with the challenge may be updated using dynamic scoring.