Abstract: Screw fixing device for a concrete construction element comprising a screw (1) and a sheath (4) of synthetic material intended to be fixed in the concrete. The sheath and the screw possess a trapezoidal thread. Externally, the sheath possesses peripheral anchoring ribs (7) of triangular section, except in its upper part (6). The slope of the flanks (8) of the ribs facing the entry to the sheath is about 30.degree.. The sheath of synthetic material is surrounded by a metal sheath (12) bearing on these flanks (8) but having a play relative to the other flanks (9) of the ribs.

Abstract: A data processing system capable of processing data in a plurality of modes including an input/edit mode is disclosed. The system includes a data name memory, start address memory and edit condition memory wherein the status of data being processed in the input/edit mode is stored when processing in the input/edit mode is interrupted to enable processing in a different mode and based upon which the system resumes processing in the input/edit mode.