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For example, if you have to write a paper, you might use the application-software program Microsoft Word. A third personal-computer operating system family that is gaining in popularity is Linux (pronounced “linn-ex”). Linux is a version of the Unix operating system that runs on the personal computer. Unix is an operating system used primarily by scientists and engineers on larger minicomputers. These are very expensive computers, and software developer Linus Torvalds wanted to find a way to make Unix run on less expensive personal computers. Linux has many variations and now powers a large percentage of web servers in the world. Scientific Software Quality Not Always Good For instance, a Microsoft Windows desktop application might call API functions in the .NET Windows Forms library like Form1.Close() and Form1.Show() to close or open the application. Without these APIs, the programmer needs to write these functionalities entirely themselves. Companies like Oracle and Microsoft p...

We don’t suggest you leave your existing source of income and jump into freelancing per se. Try it as a part-time venture to see how it works out for you in the initial months. Well, when 11 percent of the working adult population in the United States is working primarily as full-time freelancers, there must be something good about this industry. Simply Hired Find work for your skills Explore the kind of work available in your field. Ways to earn Learn why Upwork has the right opportunities for you. Find professionals you can trust by browsing their samples of previous work and reading their profile reviews. I also recommend this article on how to become a freelance writer. But if you have enough advocates for your business walking around the world talking to people in their own lives, chances are that one of them will refer someone to you. And as you’ve probably seen from your existing advocates, those relationships don’t always bear fruit quickly. Browse Portfolios So hard wor...