This has been an historic year for the Astronomical Telescopes + Instrumentation symposium. This is the symposium that advances astronomical engineering. To support this vital community during an unprecedented time, SPIE is transitioning this event into a safe and accessible, no-charge Digital Forum that will run 14-18 December 2020. This online SPIE event will include live plenary presentations, on-demand technical talks, and opportunities to connect with other participants. Experts in this community will gather to share recent results, present new concepts, and discuss ongoing and future telescope projects. The 2020 program includes a robust lineup of speakers and global participation. As more information is available, we will continue to update this website and email instructions for participation.