A communications terminal is provided for communicating data packets with a mobile communications network. The body is configured for removable insertion into a specimen slide printer, and includes a slide holder receiving opening and a slide feed opening. Each of the clients requests from the server a subtask upon occurrence of a first event, for example, an idle machine. By means of this, it is possible to achieve a TFT substrate, whose producing processes are simplified, for use in a liquid crystal display device in which electric field concentrating patterns of electrodes, via which a voltage is applied across a liquid crystal, are alternately provided at different heights in a thickness direction of a liquid crystal layer. Furthermore, different crystalline forms of sertraline hydrochloride alcohol solvates, crystalline forms of sertraline hydrochloride hydrates, referred to hereinafter as polymorphic form CSC1, a process for the preparation of the amorphous form of sertraline hydrochloride, and different processes for the preparation of polymorphic forms I, II, V, and T1 are disclosed.