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Adobe PDF files —short for portable document format files— are one of the most commonly used file types today. If you've ever downloaded a printable form or document from the Web, such as an IRS tax form, there's a good chance it was a PDF file. Whenever you see a file that ends with .pdf, that means it's a PDF file.
The Apollo Guidance Computer image in Section 1.2.3 was released by NASA and is in the public domain. The traffic light in Section 2.1 is from iStock-Photo, and the rotary traffic signal is from the Wikimedia Commons. The pic-ture of Grace Hopper in Chapter 3 is from the Computer History Museum. The
A computer is a programmable electronic device that can process, store, and retrieve data. It processes data according to a set of instructions or program. All computers consist of two basic parts, namely hardware and software.
4 Chapter 1 Introduction to Computers and Programming Figure 1-3 The ENIAC computer (courtesy of U.S. Army Historic Computer Images) Figure 1-4 A lab technician holds a modern microprocessor (photo courtesy of Intel Corporation) Main Memory You can think of main memoryas the computer’s work area.This is where the computer stores a program while the program is running, as well as the data ...
computer is an electronic device that can be programmed to accept data (input), process it and generate result (output). A computer along with additional hardware and software together is called a computer system. computer system primarily comprises a central processing unit (CPU), memory, input/output devices and storage devices.
This chapter defines the notion of computing, discusses the concepts of hardware and software, and concludes with an introduction to the development of software, called computer programming.
What is a computer? modern computer is a collection of many components: the display, a keyboard, a disk drive, speakers, camera, microphone, network connection, etc. The two most important components are: the Central Processing Unit (CPU): a compact electronic chip that executes simple instructions. This is the part that "computes".
