article Free Access Share on Islands: aliasing protection in object-oriented languages Author: John Hogg Bell-Northern Research, Ottawa, Ontario Bell-Northern Research, Ottawa, OntarioView Profile Authors Info & Claims ACM SIGPLAN NoticesVolume 26Issue 11Nov. 1991 pp 271–285https://doi.org/10.1145/118014.117975Online:01 November 1991Publication History 211citation884DownloadsMetricsTotal Citations211Total Downloads884Last 12 Months30Last 6 weeks8 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my Alerts New Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteeReaderPDF

OTM is a concurrent object language presently being implemented at the University of Toronto. It provides a novel, simple and powerful way of structuring tasks or collections of operations. This paper describes the concurrency control features of OTM, which include external termination of tasks. An example demonstrates how the language can be used to cleanly and concisely control cooperating objects.

Conventional electronic mail is passive text that is created, sent and read. Any further actions must be initiated by the recipient. By contrast, an "intelligent message" (imessage) is an active program that carries on a dialogue with the recipient. The imessage may subsequently route itself to other users as a result of the responses it receives, and it eventually returns these responses to the original sender.This paper describes a prototype intelligent mail system and discusses some of the problems involved in implementing such a system in a distributed environment.

Message systems send and receive messages but do not manage the information the messages contain. Database management systems manage the information of a global database but do not have a notion of address. In this paper the authors outline a prototype system which integrates the facilities of message systems and database management systems. The system manages structured messages according to their contents. The messages can be stored within a station and transferred between stations. Information present in the messages can be queried in a distributed manner. Message structure can also be exploited by automatic procedures which recognize triggering conditions and perform user specified actions.