olemus
üht tööprotsessi toetav väikese sihtrühmaga rakendus
=
a vertical market application,
any software application that supports a specific business process and targets a smaller number of users

ülevaateid
https://www.techopedia.com/definition/9909/vertical-application

https://www.chegg.com/homework-help/explain-difference-horizontal-vertical-application-software-chapter-7-problem-2q-solution-9781285633190-exc

https://en.wikipedia.org/wiki/Vertical_market_software