Diesel is a term referring to a type of fuel composed of distillates obtained in petroleum refining operation or blends of such distillates with residual oil used in motor vehicles . The boiling point and specific gravity are higher for diesel fuels than for gasoline. Diesel fuel is used to run farm machinery, heat houses, and run trucks.
A Disk is a memory device which uses a magnetic media for the storage of information. Disk, as a term, has expanded into other areas often used to describe the shape of the storage media, that is: floppy disk, compact disk, laser disk, or hard disk. It sometimes refers to the way in which the storage media mimics a disk media; that is, RAM disk or bubble memory.