Dear Colleagues, We cordially invite you to the *3rd Brain-Computer Interface Un-Conference* (BCI-UC) on*January 27th, 2022, from 03:00 pm to 09:00 pm (CET)* [1]! The BCI-UC is an online un-conference that provides rapid dissemination of novel research results in the BCI community. Participants can *submit abstracts* to apply for *20 minutes presentation* slots. Abstracts are not reviewed by a program committee. Rather, all registered participants can vote on which of the submitted abstracts they would like to see presented at the un-conference. Because the BCI-UC does not publish conference proceedings, submitted abstracts can report novel as well as already published work. *Registration and attendance are free of charge*. Presentations of the 1st and 2nd BCI-UC can be re-watched at [2] and [3]. The 3rd BCI-UC will feature *keynotes* by *Cynthia Chestek* (University of Michigan) [4] and *Thorsten Zander* (TU Brandenburg) [5]. *Registration and abstract submission open on November 1st, 2021* [1]. Abstract submissions are text-only. The length and format of the submissions are up to the authors - use whatever format you consider best for attracting up-votes!*Submission closes on December 3rd, 2021 at 11:59 pm*. *Voting on submitted abstracts begins on December 6th, 2021, and closes on December 12th, 2021 at 11:59 pm*. We will invite the authors of the top-voted abstracts to present at the un-conference. *All presentations will be streamed via Crowdcast* [6] and can be accessed free of charge. Join us in supporting this novel community-driven dissemination of research results! The BCI-UC committee: Moritz Grosse-Wentrup Anja Meunier Philipp Raggam Jiachen Xu Links: [1] https://bciunconference.univie.ac.at/3rd-bci-uc/ [2] https://bciunconference.univie.ac.at/past-events/1st-bci-uc/ [3] https://bciunconference.univie.ac.at/past-events/2nd-bci-uc/ [4] https://scholar.google.com/citations?user=36sxAZEAAAAJ&hl=de [5] https://scholar.google.com/citations?hl=en&user=0E49HxYAAAAJ [6] https://www.crowdcast.io/ -- DI Philipp Raggam, BSc Research Group Neuroinformatics Faculty of Computer Science University of Vienna Hörlgasse 6, A-1090 Wien, Austria