Abstract: In one embodiment, the present invention is a method and apparatus for matching buyers and sellers in an anonymous online marketplace. One embodiment of a method for defining a community of network users includes collecting data relating to the network users, where the data is of at least one of the following types: demographic information relating to the network users, Internet Protocol address information relating to the network users, and Internet Protocol traffic information relating to the network users. The collected data is then anonymized, where the anonymizing is performed individually for each type of data. The anonymized data is aggregated to generate an activity-to-demographic mapping representative of network activity associated with particular demographics of the community of network users.

Abstract: In one embodiment, the present invention is a method and apparatus for matching buyers and sellers in an anonymous online marketplace. One embodiment of a method for defining a community of network users includes collecting data relating to the network users, where the data is of at least one of the following types: demographic information relating to the network users, Internet Protocol address information relating to the network users, and Internet Protocol traffic information relating to the network users. The collected data is then anonymized, where the anonymizing is performed individually for each type of data. The anonymized data is aggregated to generate an activity-to-demographic mapping representative of network activity associated with particular demographics of the community of network users.

Abstract: In one embodiment, the present invention is a method and apparatus for matching buyers and sellers in an anonymous online marketplace. One embodiment of a method for defining a community of network users includes collecting data relating to the network users, where the data is of at least one of the following types: demographic information relating to the network users, Internet Protocol address information relating to the network users, and Internet Protocol traffic information relating to the network users. The collected data is then anonymized, where the anonymizing is performed individually for each type of data. The anonymized data is aggregated to generate an activity-to-demographic mapping representative of network activity associated with particular demographics of the community of network users.

Abstract: In one embodiment, the present invention is a method and apparatus for matching buyers and sellers in an anonymous online marketplace. One embodiment of a method for defining a community of network users includes collecting data relating to the network users, where the data is of at least one of the following types: demographic information relating to the network users, Internet Protocol address information relating to the network users, and Internet Protocol traffic information relating to the network users. The collected data is then anonymized, where the anonymizing is performed individually for each type of data. The anonymized data is aggregated to generate an activity-to-demographic mapping representative of network activity associated with particular demographics of the community of network users.

Abstract: Apparatus for recording and play back of radar video employs a conventional TV video recorder. A multiplexer accepts radar timing signals, synchro data definitive of azimuth, a 60 Hz. reference as well as radar video and formats the signals for recording. A demultiplexer accepts video signals formatted as above, from the conventional video recorder and reformats the signals to drive a conventional PPI display. The video recorder is unmodified so conventional TV video can also be recorded or played back, interspersed, if desired, with the radar video.