The document introduces basic concepts about computers including:
1) Computers are electronic devices that process data according to a set of instructions. They can execute pre-recorded lists of instructions.
2) Computers convert raw data into useful information through processing. Data comes in many forms like numbers, words and symbols.
3) The document uses a case study to demonstrate how raw data about customer preferences can be converted into information to help Pizza Hut target their advertising.
The term Reliability, Availability and Serviceability (RAS) is a defining characteristic of mainframe computers. Historically, mainframes acquired their name, in part because of their substantial size, and because of requirements for specialized heating, ventilation, and air conditioning ( HVAC ), and electrical power, essentially posing a "Main Framework" of dedicated infrastructure
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