Related Terms. 1  operating system virtualization. 2  mobile operating system (OS). 3  OS-operating system. 4  server operating system. 5  system. 6  Microsoft Windows XP operating system. 7  Linux OS (Operating System). 8  paravirtualized operating system. 9  NOS-network operating system. 10  Chrome OS.
Prune and shape evergreen shrubs to provide year-round hedges, ground covers and privacy screens in your yard. The scarlet firethorn (Pyracantha coccinea) and Chinese holly (Ilex cornuta) shrubs produce red-colored berries and dark-green leaves.
Growth rate: Slow to medium, with height increases of anywhere from less than 12 inches to 24 inches a year. Cost: 6 feet, $50. This evergreen acts as a great hedge, growing in a narrow, pyramid shape. Itâs a practical option, requiring little to no maintenance, and is ideal for a privacy screen or a windbreak.