A data communication system especially adapted for multi-phasic health screening in which stations remote from a central processor by a link of significant communications delay are communicative with the system identically as local stations operative in the system without delay.

A system for transmitting binary instruction or data words to or from a computer by control from a home base remote from the computer site, and characterized by the entry of signals into the computer or the extraction of signals from the computer performed by apparatus which directly connects to the computer console manual switches and indicator lights. A single telephone line forming two simultaneously active channels transmitting time-spaced pulses in opposite directions, by modems known in th...

Information is selectively exchanged between a number of closely located stations and a number of remote stations. Signals are coupled between the close stations via a first, parallel data channel. A second, serial data channel connects a common adapter circuit for the closely located stations to the remote stations. Each of the stations includes a data module for coupling signals between the first data channel and plural peripheral devices at the station. Each of the modules includes a data pro...

An information retrievel system includes a video display terminal controlled by a local microcomputer which controls the major functions thereof and is connectable in a network with other such video display terminals which function as selected purpose variable function terminals by utilizing the instructions for the local microcomputer which come from a remote central data source as data so that the user can request a particular function, that is a program or set of instructions for the microcom...

A communication system operation between computer systems which realizes highly efficient data transfer in a data processing system has sender and receiver subsystems operating under the control of an independent or common operating system. The communication system also includes: a plurality of sending buffers, a sending buffer address table having a plurality of entries and a buffer control block in the sender subsystem and a plurality of receiving buffers, a receiving buffer address table havi...

Apparatus and method for distributing data from a central digital data processing system to remote digital data processing systems and apparatus for storing data in digital data processing systems. The central digital data system creates a data descriptor which describes the data and its source location. The central system provides the data descriptor to the remote systems. The remote systems employ the data descriptor to retrieve the data to be distributed and place it in a destination. A given...

A plurality of picture data storage/retrieval apparatuses are connected to each other through a communication line. Each picture data storage/retrieval apparatus has a two-dimensional scanning device for inputting picture data, a keyboard for entering control data, an optical disk for storing the picture data input through the two-dimensional scanning device, a floppy disk for storing a control program, a CRT display device for displaying the picture data stored in the optical disk, a printer fo...

A data communication system for controlling communications between a host data processing system and a remote data processing system. The host system communicates a plurality of output condition data signals to the remote system for storage therein. The host system then specifies the recall and output of the condition data signals previously stored in the remote system by transmitting corresponding condition name signals. The host system specifies whether condition data signals or condition name...

Preferred embodiments include systems with two processors and an interconnected modem, one processor functioning as a control for both the modem and the second processor. This permits remote communication with the second processor for test or reconfiguration purposes.

A data processing system comprises a number of processing nodes, each having a processor and a local store. The workload of the system is represented by packets, including function packets specifying a function and pointers to one or more argument packets to which the function is to be applied. When a node processes a function packet, it checks whether all its argument packets are resident in the local store. If not, copies of the argument packets are fetched from the remote nodes in which they ...