Not reliable.
Variable or erratic.
Explosive.
Temporary or ephemeral.
Quick to become angry or violent.
Fickle.
Whose content is lost when the computer is powered down
Having its associated memory immediately updated with any changes in value.
Potentially violent.
Evaporating or vaporizing readily under normal conditions.
A variable that is volatile, i.e. has its associated memory immediately updated with any change in value.
A chemical or compound that changes into a gas easily.