![]() ![]() ![]() Scanners allow users to convert paper documents into electronic files. Printers produce paper copies of electronic files. To an individual computer or to a network.ĩ.1 Describe the common features of printersĩ.2 Describe the various types of printersĩ.3 Describe how to install and configure printersĩ.4 Describe and implement printer sharingĩ.5 Identify and apply common preventive maintenance techniques for printers The topics include how printers operate, what toĬonsider when purchasing a printer, and how to connect printers For this reason, computer programming practitioners should have some understanding of how computers operate as well as detailed knowledge of the programming language.The purpose of this chapter is to provide essential informationĪbout printers. This example highlights one danger of abstraction in unusual situations, the simplified model may provide incorrect predictions. Note that this mental model is not really correct – pressing the gas provides torque to the wheels, which may or may not accelerate the car. As long as there is a mental model that the gas pedal makes the car go faster, the brake slows the car, and the steering wheel makes the car turn, a driver can be reasonably effective. For example, the driver of a car is not required to understand the mechanics of a car engine in order to drive. Abstraction Abstraction is the pruning away of complexity resulting in a simplified mental model of a process. Instead, computer programming relies upon the principal of abstraction to allow us to specify what actions a computer should perform. ![]() Direct control of such complexity is beyond our abilities. interpreted languages ✓ A simple C++ program ✓ Specifying variables ✓ Assignment and mathematical operations Programming Languages Computers are among the most complex artifacts made by humans and are comprised of billions of distinct elements. Some specific elements covered are: ✓ High-level computer languages ✓ Compiled vs. This chapter will look at a simple computer program. ![]() Computer programs are the means for specifying what actions a computer performs. Computers are tools for manipulating and analyzing information. ![]()
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