In 1971, Vallée left Stanford to join the Engelbart group as a senior research engineer. His tenure at ARC coincided with the group's immersion in Erhard Seminars Training and other social experiments, ultimately prompting his departure. While at the Institute for the Future as a senior research fellow from 1972 to 1976, he succeeded Paul Baran as principal investigator on the large National Science Foundation project for computer networking, which developed one of the first ARPANET conferencing systems, Planning Network (PLANET),"PLANET – IRC History, ARPANET Chat, Conferencing, Jacques Vallee, Internet."Living Internet. Accessed June 30, 2021. Archived from the original. predating instant messaging by many years. The technology was spun off into InfoMedia, a startup company founded by Vallée in 1976. Although the firm formed several international spinoffs and partnered with a variety of prominent firms and governmental organizations (including Lehman Brothers, Renault and NASA), it failed to attain long-term profitability.
