olemus
infoturbes:
(a) organisatsioonis viibiv organisatsiooniväline isik
= an outsider visiting the organization

(b) nimelise kontota ajutine juhukasutaja
= a user given temporary access to a system despite not having an account of their own

(c) registreerimata teenusekasutaja
= unlisted user of a service

näiteid
https://documentation.sas.com/?cdcId=calcdc&cdcVersion=3.4&docsetId=calauthmdl&docsetTarget=n067qoyrgu1yohn19nq4ehy8o0b3.htm&locale=en

https://www.computerhope.com/jargon/g/guest.htm