DIS is Draft International Standard, the near-final draft that ISO national bodies vote on before it becomes an official standard.

Also: LEWG is the Library Evolution Working Group.

“Draft International Standard”, but that doesn’t mean much unless you read how the ISO process works[1]. (It’s like writing “Advanced Encryption Standard” instead of “AES”—unhelpful beyond giving the broadest category to which the thing belongs, “a document” resp. “a cipher”.)

[1] https://www.iso.org/stages-and-resources-for-standards-devel...

Draft International Standard (https://committee.iso.org/sites/tc211/home/resolutions/isotc...)

This was the vote to promote the current proposal to draft standard.