olemus
pinu uusimale elemendile viitav muutuja

ISO/IEC 2382:
pinumälus kõige hiljem salvestatud andmeüksust sisaldava mälupesa aadress
= the address of the storage location that contains the item of data most recently stored in a pushdown storage

ülevaateid
https://en.wikipedia.org/wiki/Stack_register

https://www.prepbytes.com/blog/stacks/stack-pointer-types-applications-and-operations/