Virtual Private Server

A virtual private server (VPS, also referred to as Virtual Dedicated Server or VDS) is a method of partitioning a physical server computer into multiple servers that each has the appearance and capabilities of running on its own dedicated machine. Each virtual server can run its own full-fledged operating system, and each server can be independently rebooted.

DreamHost PS
Main article: DreamHost PS

DreamHost offers a VPS based on Linux-VServer, which creates a "virtual machine" that protects a user's CPU and RAM resources from other users on the same physical machine.