:          11         Define compiler label

;          4          End of block or procedure         

<          13         Branch less than

=          13         Branch equal

>          13         Branch greater than

?          12         Compare values

@          2          Stack descriptor

A          8          Assign own value

B          11         Backward jump

C          12         Compare addresses

D          5          Stack real constant

E          3          Call procedure

F          11         Branch forwards

G          16         Alias

H          4          Start of begin block

I          8          Clear own array

J          11         Jump to user-defined label

K          12         false return from predicate

L          11         Define user label

M          4          Map result

N          5          Stack integer constant

O          16         Set line number

P          18         Plant machine code

Q          10         Real Divide

R          4          return

S          9          Assign value

T          12         true result from predicate

U          10         Unary minus