Deliverable D7.2.1 reports on the work carried out within Task T7.1: Integration of system modules and is part of the Task T7.3: Documentation of prototypes. The work described concerns the integration of core PRESEMT modules to build the 1st PRESEMT prototype. The goal of this prototype is to offer a solid sub-strate with core system functionality, which will provide the basis for (a) further functionality enhance-ment, (b) initial system evaluation, (c) incorporation of more advanced functionalities such as optimisa-tion and user adaptation, and (d) performance evaluation and parallelisation towards more (computa-tionally) efficient subsequent prototypes. The document provides information on the general architecture and functionalities of the 1st prototype and detailed information on the functionality and implementation details of the individual core system modules that are incorporated up to this point (see the following list): Pre-processing stage Corpus creation & annotation module Phrase aligner module Phrasing model generator Corpus modelling module Main translation engine Structure selection module Translation equivalent selection module Post-processing stage Post-processing module