Linux is ubiquitous. It runs on embedded devices, cell phones, and tablets which surround us. Linux runs most of the computers which underpin websites and servi

Linux is ubiquitous. It runs on embedded devices, cell phones, and tablets which surround us. Linux runs most of the computers which underpin websites and services we interact with daily, and it is the only serious choice for HPC. A few people even run it on their laptops. Windows has declined. It is still used extensively, but Microsoft no longer dictates the browser market. Microsoft Office is commonplace, but has genuine marketshare competition in alternatives like Google Docs. Developers increasingly build "desktop" applications as web-based or multiplatform-first instead of Windows-exclusive, with the notable exception of AAA games. The Linux subsystem for Windows is a direct admission by Microsoft that developers want to work with Linux-based software for many tasks.