i The machine is simple to programme using the machine language.
ii Programmes are faster, since many main store transfers are eliminated, and the access time of the nesting store is virtually zero. They are more compact because less information is required to specify many instructions.

iii As the operation of the arithmetic unit is largely independent of the main store, their controls may readily he separated. This allows store control to process instructions whilst the arithmetic unit control processes a prior instruction, thereby leading to faster execution of the programme.