Software that is in a constant state of updating. Intended to be convenient to the user and meant to disrupt hackers.
Evergreen (Wikipedia)
A silver fir shoot showing three successive years of retained leaves.
In botany, an evergreen is a plant which has foliage that remains green and functional through more than one growing season. This also pertains to plants that retain their foliage only in warm climates, and contrasts with deciduous plants, which completely lose their foliage during the winter or dry season.
