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.
Spacing will depend on the type of shrub or tree you are planting and how close you want them at maturity. 1  Evergreen Trees For evergreen trees, like junipers and cedars, you would want 6-8 feet between trees. 2  Evergreen Shrubs Mid-sized evergreen shrubs you may want to plant 3 to 4 feet apart.