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.
Plant evergreen ornamental varieties for year-round specimen plants. Grasses include blue oat grass (Helictotrichon sempervirens) and tall blue fescue (Festuca amethystine). Blue oat grass is a semi-evergreen fountain grass. It grows well in zones 4 through 9 and needs dry, well-drained soil.
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.