Initiated PR on branch tickets/DM-22801, assigned review to Leanne Guy. Summary of the two proposed changes to the glossary in lsst texmf are below:

Changed:
"LSST","Legacy Survey of Space and Time (formerly Large Synoptic Survey Telescope)","Gen","","","A"

Added:
"VRO","Vera C. Rubin Observatory","Gen","","","A"

Did not add because it's unclear this is an acronym going to be used, and because SST is already "Subsystem Science Team":
"SST","Simonyi Survey Telescope","Gen","","","A"

Now I'm thinking we should change SST (Subsystem Science Team) to DM-SST 

We could. Tim Jenness suggested putting "Simonyi Survey Telescope" into the glossary part instead of as an acronym, so I did that for now, but it's an easy switch. Not sure how likely it is that "SST" in reference to the telescope will become a commonly used acronym?

I think that is a good idea, and updating DM-SST in any case 

I figured if we're going to update to DM-SST, may as well define SST for the telescope. Made another commit:

New:
"DM-SST","Data Management Subsystem Science Team","LSST DM","","DMSST","A"

Updated:
"SST","Simonyi Survey Telecope","Gen","","SST","A"
"DMSST","DM System Science Team (see DM-SST)","LSST DM","","DM-SST","A"
"Simonyi Survey Telescope","The telescope at the VRO that will perform the LSST (this refers to all physical components: the mirror, the mount assembly, etc.).","","","SST","G"

As the PR was approved by Leanne I've marked this ticket done.