Information Technology Evolution Leading to the Cloud
The evolution of information technology (IT) solutions has been defined by several distinct hardware and software models. To start, early IT solutions from the 1960s to mid-1980s were characterized by mainframe computers similar to that shown in FIGURE 3-3, which had the following characteristics:
Large capital investment for data-center-based computers
Large, expensive disk and tape storage systems that often provided only limited storage capacity
User interface to the system provided through dumb terminals
Limited computer–network interconnectivity
System security maintained through physical security (few users had direct access to the computer hardware)
FIGURE 3-3 Computing ...
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