An item may sometimes be described as being a virtual item when it is a representation or non-tangible abstraction of the physical object, or is a functional emulation or simulation of it.
An EU team is developing an air quality monitoring hardware system for public use. After developing case studies for numerous European cities, the team designed, then built and tested sensor and communication modules, including software.
EN 
CS
DE
ES
FR
HU
IT
PL
PT
РУ
SK
TR
УК
AR
中文
