Wine, stands for WINE Is Not (a) Emulator, it is a program made to allow people how run Linux or other Unix like OS to run programs made for windows, most common use is games. How it works is by setting up a fake windows system on your computer under the /home/username/.wine dirctory in which it uses to "trick" to programs into thinking that you are running a Windows system of your choice.
Posted: Sun Jun 21, 2009 3:07 pm
Does virtual box for Ubuntu fall under this category?
I don't thing VirtualBox and wine would be in the same category. While yes VirtualBox is not an emulator ether but VirutalBox is a Virtual Machine system like VMware, qemu, XEN, KVM, etc. Wine just allows users to run windows programs on top of Linux while VirtualBox requires a guest OS in order to work.