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Date Created: 12/21/15
Advantages of college online payment This book focuses on companies that produce and sell software either for hire or for the mass market. Before you can truly understand the software industry and how it works, you really need to understand its key product: software. This chapter is a bit technical, but important. It describes what software is and how it is created. It then describes the basic types of software products and related services online payment for college that companies in the software industry produce and describes what types of companies the software industry includes as the focus of this book and what types of companies it does not. Computer software or software refers to computer instructions that control the functioning of computer hardware and direct its operations. Software includes two types of instructions machine instructions the binary code that turns certain electronic pulses on and off to communicate with the computer processor and source code (more human-understandable instructions. Since a computer can only understand machine instructions, software source code must be translated into machine code. This is accomplished using something called a compiler. For a hypothetical piece of code visually illustrates the process by which a compiler translates human-understandable software source code into machine-understandable object code that can be executed by the computer processor. To put things into perspective, it might help to understand just how large software systems are today. Since some of the first software systems were used to perform repetitive calculations in World War II, software systems have become increasingly complex. For example, the first edition of the Unix operating system released in 1971 had 4,200 lines of code, 7 but the MS Windows XP operating system released in 2001 has more than 45 million lines of code.8 The code for VisiCalc (the first electronic spreadsheet program introduced in 1981) could fit in 27,520 bytes of storage, whereas the code for the latest version of Microsoft’s Excel requires orders of magnitude more storage. The flame computer virus that attacked Iranian computers in 2012 contained more than 250,000 lines of LUA code the same programming language used to create the computer game called Angry Birds. LUA is a Portuguese word that means “moon”; the programming language was created by developers in Brazil. SAP’s enterprise resource system is believed to have 250 million lines of code. A typical new automobile averages 100 million lines of code. Undoubtedly, today’s software systems such as business-to-business College online payment electronic procurement systems are increasingly sophisticated and must meet more demanding requirements than in the past. Based on the analysis and design of requirements, the software code is created. Software programming involves writing the source code or computer instructions for a software system. As noted previously, in the early days of computing, programs were written by hand. Today, some programs are still written by hand, but there are also many tools available to help with coding tasks.
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