With mainframe software architectures, all intelligence is within the central host computer (processor) Users interact with the host through a dump terminal that captures keystrokes and sends that information to the host. Centralized host-based computing models allow many users to share a single computer’s applications, databases, and peripherals. Mainframe software architectures are not tied to a hardware platform. User interaction can be done using PCs and UNIX workstations.
A limitation of mainframe software architectures is that they do not easily support graphical user interfaces or access to multiple databases from geographically dispersed sites. They cost literally thousands of times more than PCs, but they sure don’t do thousands of times more work.
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