Can you try a calculated field like this?
IF CONTAINS([Model], "SER") THEN
ELSEIF CONTAINS([Model], "STO") THEN
ELSEIF CONTAINS([App], "App_1") THEN
ELSEIF CONTAINS([App], "App_2") THEN
Would I then make that a Set, and how would I filter on each Technology ?
This would just be a calculated dimension with each of the four values. You could use the dimension just like any other dimension--you can place it on a view, use it on the color card, use it for a filter, etc.
Thank you so much !