olemus
mitmekihiline hierarhiline süsteem
=
a system consisting of hierarchical layers with different units of functionality

näiteid
https://en.wikipedia.org/wiki/Layered_system

http://www.dossier-andreas.net/software_architecture/layers.html

http://www.idc-online.com/technical_references/pdfs/information_technology/Operating_System_Structure_I.pdf

ISO/IEC TR 24722:
süsteem, milles individuaalsete biomeetriaskooride põhjal
määratakse teise biomeetriaandmetöötluse otsustusläved
= system where individual biometric scores are used to determine the pass/fail thresholds of other biometric data processing

vt ka
- kiht
- OSI mudel
- TCP/IP-mudel