olemus
üks ajalise kattuvuse vorme
SO/IEC 2382:
konkurentsed on protsessid, mis toimuvad mingis ühises ajavahemikus, mille kestel neil tuleb võib-olla vaheldumisi kasutada ühiseid ressursse, näiteks mitu programmi, kui neid täidetakse multiprogrammeerimise teel arvutis, millel on üksainus käsuseade
= pertaining to processes that take place within a common interval of time during which they may have to alternately share common resources.
Example. Several programs, when executed by multiprogramming in a computer having a single instruction control unit, are concurrent.

ülevaateid
https://en.wikipedia.org/wiki/Concurrency_(computer_science)
http://tutorials.jenkov.com/java-concurrency/concurrency-vs-parallelism.html
https://www.ukessays.com/essays/information-technology/introduction-of-concurrent-processes-in-operating-systems-information-technology-essay.php
https://encyclopedia2.thefreedictionary.com/concurrent+processing

vt ka
- rööpne
- simultaanne