Question: What is the videoconferencing product that both IBM and PictureTel worked on?
Sentence: While videoconferencing technology was initially used primarily within internal corporate communication networks, one of the first community service usages of the technology started in 1992 through a unique partnership with PictureTel and IBM Corporations which at the time were promoting a jointly developed desktop based videoconferencing product known as the PCS/1.
Answer in sentence: yes