Õ: sidetehnoloogia on infotehnoloogia osa, seega ICT = IT

olemus
sõltub kontekstist

näiteid
https://www.lawinsider.com/dictionary/ict-system

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

https://www.open.edu/openlearn/ocw/mod/oucontent/view.php?id=2851&printable=1

https://core.ac.uk/download/pdf/129782286.pdf

https://e.huawei.com/it/eblog/enterprise-networking/campus/201903281226