not permanent; not lasting; "politics is an impermanent factor of life"- James Thurber; "impermanent palm cottages"; "a temperary arrangement"; "temporary housing"
A license plate, usually made of cardboard, issued to a motorist for a short period of time typcially for a month or less. This is often while the motorist waits for the license plates to be issued, or has to move a car from one location to another.
Storage which allows deletion of data or files. Magnetic tape and disc storage are the most common but laser discs and writable CD-discs are also available.