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.
Shade Tolerant Trees: Evergreen Conifers. Evergreen conifers are particularly good for adding year round greenery and texture, and many can be clipped either to create formal shapes or to keep them within bounds even in the smallest of gardens.