PLATO (CYBIS) Community

CYBIS (CYber-Based Instructional System) started life as PLATO (Programmed Logic for Automatic Teaching Operations) and was developed at CERL (Computer-based Education Research Laboratory) at the University of Illinois.

In the context of this site, we use the term PLATO to mean ALL versions of PLATO and its decendents. There are other uses of the PLATO name being used (for instance) by the Westfield State University Center for Instructional Technology .

Learn more: The PLATO Project

In 2025, significant work was undertaken to make PLATO ¹⁾ more accessible to the hobbyist developer community. One of the most frequently expressed interests was in learning more about the “internals” of PLATO. Systems knowledge ordinarily passed from senior members of the systems development team to the more junior members. While some of the history is preserved in the form of notes file archives, wading through the thousands of messages is a bit impractical when trying to gather answers to present-day implementation questions.

Complicating matters further is the somewhat broken lineage of the various PLATO decendents. As custody of PLATO (and its trademark) changed, some of the history captured in notesfiles became fragmented or completely lost. Archives of the announcements and systems programmer's notesfiles have been conserved and are available to the hobbyist community.

A decendent of PLATO Learning ²⁾ is still active and continues to sell educational products. The organization, formerly known as PLATO Learning, has evolved under the name Edmentum and is now part of the Edmentum family, which provides a range of educational solutions. Edmentum offers standards-aligned products and services, including online course supplements and curricula, catering to various educational needs. None of these products or services resembles the original PLATO work.

NovaNET, a web-based curriculum and learning management system, has a rich history dating back to 1960. It originated from PLATO, an effort at the University of Illinois. NovaNET was used in various educational settings, including the Wake County Public School System in North Carolina, where it provided individualized, computer-based instruction for high school course credit, remediation, and enrichment. Despite its success, NovaNET faced challenges in the competitive landscape of web-based learning solutions and was officially retired by Pearson in 2016. The End of the Road for NovaNET commemorates the official shutdown.

In addition to finding coherent sources of authoritative knowledge, there were other practical concerns in working with the technologies. The structure of the PLATO system is complicated due to numerous connected dependencies: Operating Systems, Programming Languages, Minimal Architectural Documentation, Lack of Historical Context (not just what was done but why…), and more.

The PLATO (CYBIS) version provided to the Hobbyist community by VCampus and BT Consulting, is the last known release of the CDC Lineage of PLATO. The NovaNET version currently undergoing conservation efforts, is the last known good state of the UCI → Pearson Learning Lineage of PLATO. Brian Dear's book The Friendly Orange Glow provides an exhaustive chronology of the rise and evolution of these historic works.

Cyber1.Org maintains a production version of CYBIS the sense of the online community that existed in the heyday of PLATO. There, you can learn about the origins of real-time chat, interactive help, chronicles of historically important lessons, and more.

The mission of Retro1.Org is complementary to the work of Cyber1. These pages in the CODEX, are dedicated to conservation of the technical elements of managinging and maintaining these historically relevant systems. Capturing release specific information, documentation and guidance for using these systems are our objectives.

Navigation here is facilitated in multiple modes:

• Guided - Directed hints connecting articles of topical interest
• Self-Guided - Topic-oriented browsing of topics using the navigation pane.
• Dynamic Search - using specific search terms, keywords, tags or other hints to “find” a topic of interest.

The following are guide navigators which correlate to most requested learning paths:

1. PLATO Installation (dtcyber)
2. PLATO Configuration Guide

1. Operating PLATO
2. PLATO Account Management
3. PLATO Group Management

1. CYBER1 Signup
2. Retro1.org Signup

1. TUTOR Programming
2. COMPASS Programming

Some of the projects are confined to the work that the restoration/rebuild team is conducting.