A theoretical construct or device with known input and output characteristics but unknown method of operation.
A flight recorder; the brightly colored cockpit voice recorders and flight data recorders in an aircraft designed to aid in determining the cause of an accident.
A device used in phreaking that prevents the calling party from being billed for the call placed.
A type of theater characterized by a lack of decoration or complex mechanisms.
Any similar device on motor vehicles, such as rail event recorders and ship trip recorders.
To focus on the inputs and outputs without worrying about the internal complexity.
A method or direction of proceeding.
A slot available for allocation to a railway train over a given route in between other trains.
Pathology.
A sequence of vertices from one vertex to another using the arcs (edges). A path does not visit the same vertex more than once (unless it is a closed path, where only the first and the last vertex are the same).
A metaphorical course or route; progress.
A trail for the use of, or worn by, pedestrians.
A continuous map f from the unit interval I=[0,1] to a topological space X.
A course taken.
A Pagan tradition, for example witchcraft, Wicca, druidism, Heathenry.
A human-readable specification for a location within a hierarchical or tree-like structure, such as a file system or as part of a URL.
To navigate through a file system directory tree (to a desired file or folder).
To make a path in, or on (something), or for (someone).