The Quartus software suite, developed by Intel (formerly Altera), is a comprehensive tool for designing, testing, and compiling digital circuits for FPGAs (Field-Programmable Gate Arrays) and CPLDs (Complex Programmable Logic Devices). Quartus 14.1, being a specific version of this software, offers a range of features and improvements for handling complex digital designs.

Software like Quartus 14.1 requires a valid license to use legally. This license ensures that the software is used within the bounds of the law and allows the software developers to support their products and continue innovating.

Software licensing is a legal agreement between the software developer and the user. It grants the user permission to use the software under certain conditions. Licenses can be perpetual, subscription-based, or for a specific period, and they often come with restrictions on use, distribution, and modification.