Another groundbreaking application was called FORUM. This application was perhaps the first so-called CB Simulator that allowed users to converse with one another in what is now known as a chat room. This application showed the potential of multiuser communication and led to the development of CompuServe's chat application.
TOPS-10 had a very robust API that used a mechanism called a UUO which is an acronym for Unimplemented User Operation. UUOs implemented operating system calls in a way that made them look like machine instructions. The API was called Monitor Calls and was very much ahead of its time like most of the operating system. System programming on DECsystem-10s was simple and powerful thanks to this extremely flexible operating system API.
TOPS-10 had an interesting scheduler with many run queues, unlike OpenVMS for example which has two run queues, and inserts processes into the queue depending on process priority. The TOPS-10 Operating System also included User file and Device independence.
TOPS-10 was a very fast and flexible operating system that was far ahead of its time.
Paul Allen maintains several publicly accessible historic computer systems, including a DECsystem-1090 running TOPS-10.
The following programming languages were implemented on TOPS-10 as layered products:
The following programming languages were implemented on TOPS-10 as contributions from DECUS members:
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Sep 24, 2012; ALEXANDRIA, Va. -- The following information was released by the American Medical Group Association: The American Medical Group...