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Compaq discontinued the mainframe business after the acquisition. Later, Hewlett-Packard acquired Compaq in 2001, predominantly for PC business interests. 2. The Mainframe era was a hardware-predominant system. Software was just considered the byproduct of the hardware systems. 3. All the mainframe computers accepted the tasks as jobs. In IBM mainframe systems, Job Control Language (JCL) is still used for submitting batch jobs to the mainframe computers. 4. Security, sharing, and so on to the extent that the enterprises focus today were of limited concern in the Mainframe era.
Mainframe systems were big and expensive and affordable by only large- and medium-sized corporations. 2 Mainframe systems are essentially singletiered systems; architecture was referred to as the Centralized Model, and the software applications were executed on the CPU of the mainframe. This system was connected to several terminals that acted as a conduit for input/output between the mainframe system and the user. These mainframe systems were also connected to other peripherals such as printers, tape drive units, card readers, and so on.
The interactions between the provider and broker are essentially the services publication. The interaction between the requester and the broker is the task of searching for the services and the services provider. Finally, the interaction between the provider and requester is called the bind. Although the role of the service provider and the service requester is simple and straightforward, the role of the broker requires additional clariﬁcation. The broker’s role is to enable both the provider and the requester to come together to discover and understand each other, discuss, and negotiate.