olemus
ISO/IEC 29147
sideliini või võrgu kaudu antav teenus, mis
on teostatud tarkvara ja/või riistvaraga;
selle andjat võib nimetada teenusetarnijaks;
sarnaneb tootele, sest on eeskätt tarkvarasüsteem, aga
erineb tootest, sest kasutaja saab ta sageli üheainsa isendina
ning ei saa teda installida, hallata, ümber paigutada
=
service which is implemented by hardware, software, or a combination of them and provided over a communication line or network
Note. The vendor of an online service may also be referred to as a service provider. Online services are similar to products in that both are primarily software systems. Two main distinctions are that a service often appears to users as a single instance of software and that users do not install, manage, or deploy the software, but they only use the service.

ülevaateid
https://www.techopedia.com/definition/3248/online-service

https://en.wikipedia.org/wiki/E-services

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

näiteid
https://www.business.qld.gov.au/starting-business/internet-start-ups/online-basics/services

https://www.computerhope.com/tips/tip161.htm