Abstract: A guiding device for positional adjustment having a lead-screw is composed of a controlling device and a carriage rest receiving the controlling device inside. The controlling device contains a pressing post and a resilient element to push the pressing post to adjust the relative distance between the carriage rest and the lead-screw so that the lead-screw is kept straight and the positional adjustment move in an exactly horizontal. Thus, calibrations of calibrating tools mounting on the positional adjustment are precise.

Abstract: A computer lock includes a housing (1) having a pair of locking leaves (3) respectively pivotally secured on a front end portion of the housing (1) with the two locking leaves (3) combinably flattened to be inserted through a computer slot (A), and an actuating device (2) slidably held in the housing (1) to be locked in the housing, whereby upon a forward pushing of the actuating device (2) to openly bias the two locking leaves (3) for extending the two leaves (3) to be retarded against the sidewall extension disposed around the computer slot, the computer will then be stably locked with the two locking leaves (3) of the computer lock.