The University budget is available to the accounting department, but the details are generally deemed not appropriate for public consumption. These represent legal and business decisions that restrict the ability of specified people to access specified information. Inaccurate information is not much of a problem until it's your class schedule that got erased or your credit card which is mistakenly overdrawn. Data integrity means computerized data is the same as the source documents and has not been exposed to accidental or malicious alteration or destruction. Information is not particularly useful if you can't get to it.
Availability is an often overlooked, but important part of the security equation.
Computers and computer components can and do fail for many assorted reasons. Without proper planning, an organization without computers generally closes up shop and declares a holiday for employees and a nightmare for customers. With proper planning and backup procedures, organizations can continue to do business in the face of computer disasters. Information can still flow, although sometimes through alternate channels. Pitt's mainframe computers are protected by a complementary array of physical, administrative and technical controls.