olemus
andmestruktuur kutsepinus, sisaldab täitmisel oleva alamprogrammi olekuteavet
= a data structure that is activated/created when a procedure or function is invoked

ülevaateid
https://www.rose-hulman.edu/class/csse/csse404/schedule/day17/Procedures.pdf
https://www.cs.purdue.edu/homes/xyzhang/spring09/notes/ar.pdf

vt ka
- aktiveerima