Linux Mint is a community-driven Linux distribution based on Debian and Ubuntu that strives to be a "modern, elegant and comfortable operating system which is both powerful and easy to use.
CentOS is a Linux distribution that provides a free, enterprise-class, community-supported computing platform functionally compatible with its upstream source, Red Hat Enterprise Linux.
macOS is a series of graphical operating systems developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac family of computers.
Debian is a Unix-like computer operating system that is composed entirely of free software and packaged by a group of individuals participating in the Debian Project.
FreeBSD is a free and open-source Unix-like operating system descended from Research Unix via the Berkeley Software Distribution (BSD)
Fedora is a Linux distribution developed by the community-supported Fedora Project and sponsored by Red Hat. Fedora contains software distributed under various free and open-source licenses and aims to be on the bleeding edge of such technologies
Ubuntu is an open source operating system for computers. It is a Linux distribution based on the Debian architecture.
Microsoft Windows is a group of several graphical operating system families, all of which are developed, marketed, and sold by Microsoft. Each family caters to a certain sector of the computing industry.
PostgreSQL, often simply Postgres, is an object-relational database management system with an emphasis on extensibility and standards compliance.