on project coordination and software develop ment of OSPS card service features. She holds a multiple-majorHuman factors requirements have strongly influenced the design of OSPS operator terminals. This article describes the OSPS operator interface design, and several features that have been incorporated to improve operator performance from the perspectives of process, implementation, and the operator terminal. The article also presents a discussion of implementing the design on the video display terminal (VDT) , combined services terminal (CST) , and intelligent communication workstation (ICW).