Altera Quartus is a FPGA design software that is created to provide tools and functionalities in designing for all FPGA and CPLD families which are also developed by Altera. Quartus II Web Edition Software is the current product available to download. The CPLD and FPGA families this version support include Cyclone II, Cylone III, Cyclone IV, Cyclone V FPGAs, Arria II GX FPGAs but only EP2AGX45, and all MAX CPLDs. Aside from its basic support feature, this software also comes with ModelSim which is an Altera Starter Edition program from Mentor Graphics that is used for Verilog HDL (VHDL) simulation, but no need for any license to access it. It also has OpenCore Plus or PDF evaluation tools included for free. Other functionalities are verification tools, optimization tools, and design entry and synthesis tools. Altera Quartus is compatible with Windows and Linux OS computers, particularly Windows 7, Windows Vista, Windows XP, CentOS and SUSE Linux Enterprise.