Mentor 474.91 is a software suite designed for embedded software development. It includes a graphical development environment, C/C++ compiler, assembler, linker, debugger, real-time operating system, and visualizer for developing embedded applications for various target architectures. With this suite of tools, you can create, debug, and tune embedded applications for devices ranging from low-end microcontrollers to high-end processors. It also includes a library of software components that you can use to quickly and easily add functionality to your system. Additionally, Mentor 474.91 provides an automated code coverage analysis system to help maximize the reliability and safety of your embedded systems.