This week we follow-up on a bunch of continuing Zoom news, since Zoom appears to be poised to become the teleconferencing platform of choice for the world at large. They've made more changes, have been sued and have been rapidly taking steps to fix their remaining problems. We have some browser news and another worrisome look into Android apps using a novel approach to quickly characterize them. We have an interesting and sad bit of miscellany and a progress report on my SpinRite work, and then we take the sort of full technical deep dive into the joint Apple/Google Contact Tracing system that our listeners have come to expect from this podcast. By the end of this podcast everyone will understand exactly what Apple and Google have done and how the system functions, in detail.