Abstract: A method and system for the efficient distribution of electronic mail items within a distributed data processing system having multiple users enrolled therein wherein each user utilizes a computer or terminal device having a unique address. After selecting an individual electronic mail item for distribution an intuitive graphic representation of a group of unique addresses is displayed within a user's terminal device. The intuitive graphic representation may take one of several forms including a two or three dimensional graphic representation of an office floor plan which identifies the occupants of each office, or a photographic image of one or more users. In response to a graphic selection by the user of a particular graphic representation, or portion thereof, an identified electronic mail item is then automatically distributed to the user whose unique address is associated with that graphic representation or portion thereof.

Abstract: Method of, and apparatus for, providing automatic detection of potential information loss due to undersampling and automatic detection of potential storage waste due to oversampling based on automatic determination of an analog signal's Nyquist rate. The invention acquires an analog signal, determines a maximum frequency of the analog signal and a corresponding Nyquist rate, and allows a user to select a sampling rate based on either the automatically determined Nyquist sampling rate, a user specified sampling rate, a sampling rate determined by a user specified bandwidth, or a sampling rate determined by user specified available space. The invention also informs a user when a loss of information may occur due to a sampling rate being less than the Nyquist rate. The invention also informs a user when a waste of storage may occur due to a sampling rate being greater than the Nyquist rate.

Abstract: A selective secondary signalling encoder/decoder for multipoint data communications networks for use on transmission media such as telephone lines provides for selective signalling between a master broadcasting unit and however many slave units are in the network. The network functions by sending a standard (V-29) type modem training sequence and incorporating the address of the particular remote unit with which communication is desired in the data segment of the sequence. Compatibility is maintained with standard slave units that don't have this decoder by appending a sufficient number of marks to the address and message to allow for the standard starting value of a descrambler in the "data mode". When the segment is detected at each remote unit in the system, the address sent is compared to the address of the remote or slave unit.