A data processing system is described which contains a first program for enabling the operation of interactive second and third programs, the second program requiring program parameters and file data from the third program in order to operate in conjunction therewith. The first program displays a menu of functions performable by the second program when it is run in conjunction with the third program. The first program responds to a user-selected menu function by employing the method of: extracti...

A wall-mounted holder mounting a multiple section program for use with coin-operated jukeboxes or phonographs wherein a plurality of individual program tabs or cards, each identifying a single musical selection, are mounted in individual holding pockets provided on multi-faceted holders arranged in parallel rows for simultaneous rotational movement between selected index positions. In each index position for the holders, corresponding faces thereof are commonly aligned to expose one section of t...

The specification discloses a system for selectively applying an audio program to incoming telephone lines placed in hold conditions. The system is connected to the exterior cord of a conventional telephone set having a hold switch and a plurality of line switches operable between two positions to open and close the telephone lines. The line switches also have a plurality of illumination modes representative of different operational modes. The system includes a first electronic switch operable t...

A vehicle control system for a vehicle moving along a trackway. The trackway is divided into a plurality of sequential sections, a program means such as a magnetic tape is carried by the vehicle and contains geographical information relating to the trackway and is arranged to transmit the information to control means to control the vehicle in dependence upon said geographical information. Location identifying means are provided at fixed locations in each of said trackway sections to transmit a s...

A program loader for a programmable controller includes a read-write memory into which an initial program is loaded, tested and edited. The programmable controller is operated and the condition of an input or output device which it controls is monitored each time an instruction containing the device's I/O address is read from the read-write memory. When the loader is operated in a SEARCH mode, the program is read in sequence from the read-write memory and each instruction is compared with an ins...

Program control apparatus in which current instruction execution and next instruction fetch occur in overlapped time periods during one instruction cycle. The results of a previous instruction execution are employed to set or not set selected ones of a plurality of condition latches in accordance with a current instruction. The current instruction also includes a test code which when combined in a decoding network with the outputs of the latches will produce a selection signal to a next instruct...

A program controlled coordinate machine including at least two separately functioning coordinate modules each including a bed on each of which a carriage is supported for movement. One of the modules is supported by the other module which in turn is supported by a support module. The support is such that the carriages move in defined perpendicular directions with respect to each other. The support module is enclosed by a housing module which also supports electronic modules which house the elect...

A program reading mechanism in which a band shaped exchangeable program carrier is moved in increments by a transportation roll, with the data carried by the program carrier being scanned by contacts, and the transportation roll being driven by two flights connected to one another rotating about a common center and arranged diametrically in relationship to the common center, the flights engaging in radial slots provided for the periphery of a slotted disc connected to the transportation roll, wi...

A system for controlling CATV program viewing in a plurality of modes of operation. In a first mode of operation, a downstream digital transmission causes control means to develop first binary data for comparison in a comparator with selected-channel code data from channel means to enable a first circuit to allow a first or second category program to be selected and received by a subscriber during a predetermined temporary period of time. In a second mode of operation the enabling of a second ci...

In a computer system of sufficient extent to permit a plurality of users, each having access to a virtual machine, the executive program is divided into two components; viz: a supervisor program and a kernel program. Certain potentially dangerous instructions are permitted only in the kernel mode, and mode control is effected by the utilization of a processor status word which includes a plurality of fields which place restrictions on the running program in accordance with the mode thereof. Addi...