February 17^th.  NCCAVS ( https://avs.org/about-avs/chapters/avs-regional-chapters/northern-california/symposia-exhibitions/ ) , Vacuum Science and Technology, Fremont, CA

March 5^th to 9^th.  Pittcon ( https://pittcon.org/ ) , Laboratory Science and Analytical Chemistry, Atlanta, GA

March 20^th to 24^th.  ACS  ( https://www.acs.org/content/acs/en/meetings/acs-meetings.html ) , American Chemical Society, San Diego, CA