Windows is a OS that allows to you to control computer processes. It organizes interaction between software and the users. It is considered to be one of the leading custom operating systems.

VMware is commercial virtualization software. It is one of the most popular virtual machines that emulate the operating system based on Intel. It allows you to run multiple independent operating systems on a single physical server. It is possible to configure a virtual network for data exchange between these independent OS.

Xen is a paravirtualization technology, which can be used on many operating systems. It is distributed under the General Public License. Works exclusively on the x86 architecture.

Virtuozzo is a virtualization technology at the OS level. It allows creating a virtual private server with isolated operating systems on physical server. You can work on Linux or Windows OS.

Backup means creation of backup copies of files or database. This action is necessary to recover data after damage or destruction. Information is usually copied into individual file or an external storage device.

Hyper-V is a technology of server virtualization on Windows OS. It allows simultaneous parallel operation of several operating systems on one physical server. Each OS is isolates but it is possible to set up connection for interaction between them.

OpenVZ is a virtualization technology, which allows implementing multiple isolated operating system copies on one physical server. These copies will run independently from the main OS. OpenVZ allows you to create virtual dedicated server for different customer needs. The main feature is that OpenVZ is designed on the Linux kernel. It means that independent copies of the operating system should only be Linux distributions.

Plesk is a universal panel for professional server management. Plesk panel allows you to manage a hierarchy of users, monitor domains on the server, to set up additional services and modules, and get detailed statistics about the server. It works with Linux and Windows OS.

Directadmin is control panel which was created to make administration of websites easier. It works with FreeBSD OS and such distributions as Fedora, CentOS, Debian, Red Hat. It consists of all necessary software for webhosting including PHP, MySQL и Apache. You can create your own scripting scenarios.

ISPmanager is a webhosting management system. It allows you to work with a web server, message transfer agent, database, and other software. You can create a backup copy of the site with its help. It can be used for personal purposes or to provide professional hosting services.