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Talkomatic
Talkomatic is an online chat system that enables real-time text communication among small groups. Each participant occupies a dedicated section of the screen, with messages appearing character-by-character as they are typed. Developed in 1973 by Doug Brown and David R. Woolley on the PLATO system at the University of Illinois, Talkomatic is recognized as one of the first multi-user chat systems, predating Internet Relay Chat (IRC) by 15 years and CompuServe's CB Simulator by seven years.
The system played a significant role in the development of online communities and influenced subsequent collaborative software, including Lotus Notes. After the original PLATO implementation was discontinued in the mid-1980s, Brown and Woolley released a web-based version in 2014. Following a temporary shutdown in 2024, the system was revived as an open-source project.
In 1973, Doug Brown, a programmer working on the PLATO system at the University of Illinois, developed a prototype for group chat communication. David R. Woolley, who had previously created PLATO Notes (an early bulletin board system), collaborated with Brown to expand the program into a multi-room system with privacy controls. The finished system supported six concurrent channels, each accommodating up to five active participants, with additional users able to monitor conversations without participating.
Talkomatic distinguished itself from earlier communication systems through its character-by-character transmission protocol. Unlike conventional messaging systems that displayed only completed messages, Talkomatic showed each keystroke as it occurred, allowing participants to observe messages being composed in real time. The interface divided the screen into horizontal sections, assigning each participant a dedicated space. This spatial organization prevented the message collision that would occur if multiple users typed into a shared area simultaneously.
Whether Talkomatic was the first multi-user chat system remains a subject of historical debate. The Party Line feature of the Emergency Management Information Systems And Reference Index (EMISARI), developed by Murray Turoff for the US Office of Emergency Preparedness in 1971, has also been identified as an early multi-user communication system. However, Talkomatic's wider deployment and influence on subsequent systems have given it prominence in the history of online chat.
Talkomatic quickly became one of the most popular applications on PLATO, alongside PLATO Notes and various educational games. The system contributed to the formation of one of the earliest significant online communities, which remained active through the mid-1980s as PLATO expanded from its original University of Illinois base to commercial and educational sites worldwide. Between September 1978 and May 1985, the CERL PLATO system logged 10 million hours of use, with approximately one-third devoted to the Notes application and a significant portion to Talkomatic.
The success of Talkomatic inspired the development of Term-talk, a two-person communication program that allowed private conversations between any two PLATO users without requiring them to exit their current applications. Users accessed Term-talk by pressing the TERM key and typing "talk," creating an early form of instant messaging.
The original PLATO-based Talkomatic operated until the mid-1980s, when the commercial viability of Control Data Corporation's PLATO systems declined and many installations were shut down.
Hub AI
Talkomatic AI simulator
(@Talkomatic_simulator)
Talkomatic
Talkomatic is an online chat system that enables real-time text communication among small groups. Each participant occupies a dedicated section of the screen, with messages appearing character-by-character as they are typed. Developed in 1973 by Doug Brown and David R. Woolley on the PLATO system at the University of Illinois, Talkomatic is recognized as one of the first multi-user chat systems, predating Internet Relay Chat (IRC) by 15 years and CompuServe's CB Simulator by seven years.
The system played a significant role in the development of online communities and influenced subsequent collaborative software, including Lotus Notes. After the original PLATO implementation was discontinued in the mid-1980s, Brown and Woolley released a web-based version in 2014. Following a temporary shutdown in 2024, the system was revived as an open-source project.
In 1973, Doug Brown, a programmer working on the PLATO system at the University of Illinois, developed a prototype for group chat communication. David R. Woolley, who had previously created PLATO Notes (an early bulletin board system), collaborated with Brown to expand the program into a multi-room system with privacy controls. The finished system supported six concurrent channels, each accommodating up to five active participants, with additional users able to monitor conversations without participating.
Talkomatic distinguished itself from earlier communication systems through its character-by-character transmission protocol. Unlike conventional messaging systems that displayed only completed messages, Talkomatic showed each keystroke as it occurred, allowing participants to observe messages being composed in real time. The interface divided the screen into horizontal sections, assigning each participant a dedicated space. This spatial organization prevented the message collision that would occur if multiple users typed into a shared area simultaneously.
Whether Talkomatic was the first multi-user chat system remains a subject of historical debate. The Party Line feature of the Emergency Management Information Systems And Reference Index (EMISARI), developed by Murray Turoff for the US Office of Emergency Preparedness in 1971, has also been identified as an early multi-user communication system. However, Talkomatic's wider deployment and influence on subsequent systems have given it prominence in the history of online chat.
Talkomatic quickly became one of the most popular applications on PLATO, alongside PLATO Notes and various educational games. The system contributed to the formation of one of the earliest significant online communities, which remained active through the mid-1980s as PLATO expanded from its original University of Illinois base to commercial and educational sites worldwide. Between September 1978 and May 1985, the CERL PLATO system logged 10 million hours of use, with approximately one-third devoted to the Notes application and a significant portion to Talkomatic.
The success of Talkomatic inspired the development of Term-talk, a two-person communication program that allowed private conversations between any two PLATO users without requiring them to exit their current applications. Users accessed Term-talk by pressing the TERM key and typing "talk," creating an early form of instant messaging.
The original PLATO-based Talkomatic operated until the mid-1980s, when the commercial viability of Control Data Corporation's PLATO systems declined and many installations were shut down.