A hand-held labelerprinter for printing and applying labels is described. The power semiconductor device includes a source structure having a projected portion with a tip-shaped end portion on its center and formed so as to surround a predetermined region of right and left and upper portions of the projected portion. Accordingly, the number of parts is reduced, and it is not necessary to give any heat treatment to the clutch tooth or select any material of high strength therefor. The stop actuating assembly includes a stop-engaging member and a resiliently actuating member combined therewith. Because an application programming interface making calls to a web application platform controls the placement of security tokens, distinct programs on devices from which transmissions originate, or are bound, to place and update tokens is generally obviated.