Ch. 5 - Software - 2/10/2010 1 CIS 3003 Fundamentals of...

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Unformatted text preview: 2/10/2010 1 CIS 3003 Fundamentals of Information Technology 1 CIS 3003 Fundamentals of Information Technology 1 Information Technology in Theory By Pelin Aksoy and Laura DeNardis Chapter 5 Software CIS 3003 Fundamentals of Information Technology 2 Objectives Learn what exactly constitutes software Gain familiarity with the various types of programming languages Distinguish between different types of operating systems 2 systems Information Technology in Theory 2/10/2010 2 CIS 3003 Fundamentals of Information Technology 3 Objectives (continued) Understand the difference between system software and application software Learn about the software development process Understand the concept of open source software and related issues 3 Information Technology in Theory CIS 3003 Fundamentals of Information Technology 4 What is Software? A series of data and instructions written by programmers (or sometimes automatically generated) using a programming language, to perform a certain task 4 Information Technology in Theory 2/10/2010 3 CIS 3003 Fundamentals of Information Technology 5 Software versus Hardware Hardware: a tangible device that physically performs particular tasks Software does not physically perform these tasks itself Software provides a series of instructions to the hardware to perform a task 5 Software enables the hardware to serve many functions, or in other terms, to be programmed Information Technology in Theory CIS 3003 Fundamentals of Information Technology 6 Programming Languages Low-level programming language Sh t t t d ti Short, targeted operations For example, assembly language Used for highly specialized programming, such as manipulating the contents of the microprocessor and directly controlling the functions of the ALU Programmers who write in assembly language are 6 familiar with the details of the microprocessor Each type has a different architecture and requires different instructions for decoding and execution Information Technology in Theory 2/10/2010 4 CIS 3003 Fundamentals of Information Technology 7 Assembly Language Programmers who write in assembly language are familiar with the details of the microprocessor Each type has a different architecture and requires different instructions for decoding and execution 7 execution Information Technology in Theory CIS 3003 Fundamentals of Information Technology 8 Device Driver Assembly language programming is commonly used to create device drivers and to create instructions stored on the BIOS chip on the motherboard A device driver is software that provides an interface between peripheral components, such as printers and mice, and a computers other hardware components The computers BIOS chip supplies the vital steps that 8 the computer must follow as it is switched on Information Technology in Theory 2/10/2010 5 CIS 3003 Fundamentals of Information Technology 9 Machine Language The instructions and data that correspond to the software...
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Ch. 5 - Software - 2/10/2010 1 CIS 3003 Fundamentals of...

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