Edit: checking now ADS is a too literal of a translation (English isn't my first language). The more appropriate term is ADT.
ECS is an abstract term for a data structure. Have you ever programmed before?
Sources? I have cited mine for why it isn't.
Also, remember, it's not my responsibility to search to prove your arguments. Burden of proof is on the claimant, as it goes.
Edit: checking now ADS is a too literal of a translation (English isn't my first language). The more appropriate term is ADT.