These chips are custom designed by Parallax. They are multi-processing chips with shared memory and a built-in interpreter for programming in a high-level object-oriented language called Spin and assembly language with set of pre-built Parallax "objects" for video, miceand keyboards, NTSC/VGA displays, LCD's, stepper motors and sensors, Your application is a matter of high-level integration with Propeller chips. These chips are designed for high-speed embedded processing, while maintaining low power, low current consumption.