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.
The different colors and textures of foliage, bark, cones, or berries should also be considered in selecting evergreens. There are silvery blue juniper varieties (trees, shrubs, or ground covers) that are often effective as a contrast to redwood surfaces. Dark green Japanese yew, the female plants bearing red berries in fall and winter, are handsome against many colors of brick.