Abstract: A method for identifying unsolicited electronic mail messages in a computer network. The method includes receiving an electronic mail message and removing non-static data from the electronic mail message. A checksum is generated based on data remaining within the electronic mail message and compared with a database containing checksums for previously identified unsolicited messages. The method further includes identifying the electronic message as an unsolicited message if the generated checksum matches one of the database checksums.

Abstract: A technique is provided for deleting those portions of a video program which are in color, thereby allowing a monochrome movie or the like to be continuously recorded on video tape without interruption. Since station breaks and commercials are almost invariably in color, the automatic deletion of the color portions of a broadcast serve to effectively delete those portions of the broadcast which are not the desired monochrome movie or other monochrome broadcast. The disclosure is applicable for use in conjunction with a video tape recorder having a pause mode of operation. The presence of color burst is detected in received television signals. Means responsive to the detection of color burst are provided for generating a deleting signal. The deleting signal is then used to activate the pause mode of the video tape recorder.