Unstable release is being listed as UST in
- magiccards.info https://magiccards.info/ust/en.html
- wikipedia https://en.wikipedia.org/wiki/List_of_Magic:_The_Gathering_sets
Yet we see it having hashtag #MTGUN3 at official product page https://magic.wizards.com/en/products/unstable
Will it be UST or UN3 eventually?