Some are easy, I’ll share the ones I know

Ps = Photoshop
Id = InDesign
Pr = Premiere
Ae = After Effects
Dw = Dreamweaver

I don’t know what Xd stands for, because everyone just calls is Xd but it is UI/UX design like figma and sketch. Ai is confusing but they use it for (Adobe) Illustrator, possible they thought Il would be more confusing