atistics on 
memory usage sorted by cell sizes and classes respectively.

<P>
<B>address</B> returns the byte address of the object and is useful
as a hash function when used with hash-table, since this address is
unique in the process.

<P>
<B>Peek</B> and <B>poke</B> are the functions to read/write data directly
from/to a memory location.
The type of access should be either of
<B>:char, :byte, :short, :long, :integer, :float</B> and <B>:double</B>.
For an instance, <TT>(SYS:PEEK (+ 2 (SYS:ADDRESS '(a b)))