The RYOBI 920, 750, and 680 series are the flagship products of RYOBI printing presses. Although the dimensions are slightly different for each series, they have consistent design identity developed with same philosophy and concepts. They have modular designs, mainly consisting of 6 different units. By combining them, we have developed a total of over 800 varieties for those series. Many automated devices offer high productivity, and reduce the operators’ burden, the wastes of printing material and energy usage. The operation efficiency of GUI was studied as part of its development with the industry-university cooperation.