Yes, there are many examples of open-source software being used in professional settings. Here are a few examples:

1. Linux Operating System: Linux is a popular open-source operating system that is widely used in professional settings. Many companies and organizations use Linux to run their servers, web applications, and other IT infrastructure.

2. Apache Web Server: Apache is an open-source web server that is widely used in professional settings. It is estimated that Apache is used to host around 40% of all websites on the internet.

3. MySQL Database: MySQL is an open-source database management system that is widely used in professional settings. Many websites, applications, and other software systems use MySQL to store and manage data.

4. Mozilla Firefox Web Browser: Mozilla Firefox is a popular open-source web browser that is widely used in professional settings. Many organizations use Firefox as their default web browser due to its speed, security, and customizable features.

5. WordPress Content Management System: WordPress is an open-source content management system (CMS) that is widely used in professional settings to create and manage websites. It is estimated that around 40% of all websites on the internet use WordPress as their CMS.

These are just a few examples of the many open-source software tools and systems that are widely used in professional settings.
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