@   ( a d d r - n ) Replace address by number at address. "fetch"
!   ( n addr - )    Store n at addr. "store"
C@  ( addr - byte)  Fetch least significant byte only. "c-fetch"
C!  ( n a d dr - )  Store least significate byte only. "c-store"
?   ( a d d r - )   Display numbers at address. "question-mark"
 +! ( n addr - )    Add n to number at addr. "plus-store"
MOVE    ( addr1 addr2 n - ) Move n numbers starting a addr1 to memory starting ar addr2. if n>0
CMOVE   ( addr1 addr2 n - ) Move n bytes starting at addr1 to memory starting at addr2. if n>0. "c-move"
FILL    ( addr n byte - )   Fill n bytes in memory with byte beginning ar addr, if n>0

