Unix Information and Resources. For web hosting Unix is the most broadly used operating systems. Based on internet and the majority of web servers formerly ran on a version of UNIX. It is a multitasking operating system that is it can run many applications at the same time without them disturbing each other. When you consider that hundreds of websites, running thousands of CGI scripts, all receiving thousands of hits could be running on one web server, it becomes really important. UNIX is typically more reliable as compared to Windows hosting and most of the organizations are on UNIX rather than windows just because it is comparatively quicker and open resource. Many web sites are developed using more advanced scripting languages than basic html, most commonly either ASP or PHP. While it is possible to run either language on either platform, typically PHP is associated with UNIX while ASP is associated with Windows. After all Microsoft is who developed ASP. There is also a more advanced programming language from Microsoft called .NET which pretty much also calls for a Windows platform.