A personal computer (PC) is a general-purpose computer whose size, capabilities, and price make it feasible for individual use. PCs are intended to be operated directly by an end-user with only a general knowledge of computers, rather than by a computer expert or technician. "Computers were invented to 'compute': to solve complex mathematical problems," but today, due to media dependency and the everyday use of computers, it is seen that "'computing' is the least important thing computers do." The computer time-sharing models that were typically used with larger, more expensive minicomputer and mainframe systems, to enable them be used by many people at the same time, are not used with PCs. A range of software applications ("programs") are available for personal computers including, but ar