Italian to English Other Electronics / Elect Eng

this is not as simple as it looks. i would have thought from teh context of the document i'm translating that they are technical drawings, diagrams etc., because under the heading "produzione elaborati" we have things like

Disegni di sistemazione
Disegni di percorso impianti elettrici
Schemi unifilari

and so forth.

But then you have

Elenchi componenti
Rapporti di calcolo
specifiche tecniche

And so forth.

What concept covers all of these?

TIA.