The devices developed by AR.I.SERVIZI, as data acquisition systems or other electronic equipments, are mainly intended to provide extensions to computers with LINUX os. Linux support and drivers are provided. Other OSs can be considered on request. For example the USB linux Data Acquisition System "ARI-das1" has 18-bits 4 analog inputs and 4 analog outputs with software selectable span. A linux driver is provided, with an API interface to GCC compiler that greatly simplify the writing of the main code. The "ARI-das1" can be used, for example, to characterize electronics components or sensors, or to build other automated systems. Support can be furnisched to install LINUX on your computer together with other OSs previously installed. As continuosly improving, these devices are subject to changing, however support will be maintaned.