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.
An evergreen shrub, Escallonia (Escallonia spp.) bears glossy, dark green leaves that alternate as they grow on woody stems. Wider at the top, the leaves taper toward the base and have serrated edges. Different varieties of these shrubs grow anywhere from 5 to 15 feet tall in a rounded form.