Current developments in an experiment on Computer Communications via the ATS-1 geosynchronous satellite are described. Initiated by the Spacecraft Data Systems Branch of the Ames Research Center, NASA, this experiment is designed to demonstrate the feasibility of utilizing satellite communication links to provide computer-computer and terminal-computer communications between remotely located areas. In order that the experiment be conducted under realistic conditions, computing facilities at the University of Hawaii and the University of Alaska are connected to the Advanced Research Projects Agency computer net via an ATS-1 VHF link to the NASA-Ames Research Center. A detailed description of the experiment is provided in the ATS-1 Computer Communications Experiment Plan, attached as Appendix A. (SK)