Linux, Windows, Windows CE, Visual C++, Embedded Visual C++, ATL, COM, DCOM, XML-RPC, LUA, C, C#, .Net Framework 2.0, 3.5, .Net Compact Framework, Sql Server 2000/2005/2008, VB6, ASP.NET, SIBS, NetPay, MegaRede, Gemalto, Axalto, POS Terminals, EMV, PCI, IFSF, PCATS, NRF-ARTS, SAP, SAFT-PT, ARM , 80188 Architecture, SPDH, Critical/Real Time Systems, Financial Management Systems, RF, ICC.