CSO nameserver
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The CSO Nameserver software was developed by Steve Dorner at the University of Illinois at Urbana-Champaign. In the early-to-middle 1990s CSO nameservers [1] were commonly used to publish campus directories of student, faculty, and staff names, phone numbers and e-mail addresses. These directories were frequently organized in Gopher hierarchies. CSO directory servers competed with X.500 directory services to an extent, but had the virtue of being simpler to set up. The tools "ph" and "qi" were the two components of the system - ph was a client that queried the qi server.