Unique computer-human interface (CHI) challenges are arising with the pending deployment of automation developed to assist air traffic controllers and managers. In the US, a set of Free Flight Phase 1 (FFPl) decision-support tools will provide computer generated scheduling and sequencing advice from Traffic Management Advisor (TMA) and conflict probing advice from User Request Evaluation Tool (URET). These tools were originally developed independently using their own CHIs. Recently, the air traffic community requested that future tools be implemented as an integrated functionality with a consistent look and feel modeled on Eurocontrol's innovative Operational Display and Input Development (ODID) IV. M.I.T. Lincoln Laboratory presented an initial comparative study of FAA and Eurocontrol tools that identified several key inconsistencies between the newly deployed Display System Replacement (DSR), the upcoming FFPl and the future ODID-like CHIs at ATCA 1999. This paper expands the survey to add the ETMS Traffic Situation Display (TSD) and to include a comparison of all look and feel aspects of each tool ranging from the purpose and system requirements to the display and coordination features. Excerpts from the completed survey are presented in Table 1, accompanied by preliminary descriptions of resulting human factors issues that need resolution to achieve a common CHI for future air traffic control and management. In support of the FAA, the Laboratory is now applying the findings from this effort and previous controller testing in collaboration with MITRE CAASD to identify and assess CHI features to be used for a demonstration of integrated operational concepts. This effort, along with continued CHI requirements testing, communication with FAA vendors and concept demonstrations conducted in coordination with the air traffic community will lead to a comprehensive list of prioritized issues regarding a common CHI.