diff --git a/README.md b/README.md
index ee438b4..393a218 100644
--- a/README.md
+++ b/README.md
@@ -9,37 +9,37 @@ $ cat helloworld.fs | ./planck
 
 # Builtin Words
 
-| code | name     | stack effect   | semantics                    |
-|:----:|:---------|:---------------|:-----------------------------|
-| Q    | quit     | ( -- )         | Exit the process             |
-| C    | cell     | ( -- n )       | The size of Cells            |
-| h    | here     | ( -- addr )    | The address of 'here' cell   |
-| l    | latest   | ( -- addr )    | The address of 'latest' cell |
-| k    | key      | ( -- c )       | Read character               |
-| t    | type     | ( c -- )       | Print character              |
-| j    | jump     | ( -- )         | Unconditional branch         |
-| J    | 0jump    | ( a -- )       | Jump if a == 0               |
-| f    | find     | ( c -- xt )    | Get execution token of c     |
-| x    | execute  | ( xt -- ... )  | Run the execution token      |
-| @    | fetch    | ( addr -- a )  | Load value from addr         |
-| !    | store    | ( a addr -- )  | Store value to addr          |
-| ?    | cfetch   | ( addr -- c )  | Load byte from addr          |
-| $    | cstore   | ( c addr -- )  | Store byte to addr           |
-| d    | dfetch   | ( -- addr )    | Get data stack pointer       |
-| D    | dstore   | ( addr -- )    | Set data stack pointer       |
-| r    | rfetch   | ( -- addr )    | Get return stack pointer     |
-| R    | rstore   | ( addr -- )    | Set return stack pointer     |
-| i    | docol    | ( -- addr )    | Get the interpreter function |
-| e    | exit     | ( -- )         | Exit current function        |
-| L    | lit      | ( -- a )       | Load immediate               |
-| S    | string   | ( -- addr len) | Load string literal          |
-| +    | add      | ( a b -- c )   | c = (a + b)                  |
-| -    | sub      | ( a b -- c )   | c = (a - b)                  |
-| *    | mul      | ( a b -- c )   | c = (a * b)                  |
-| /    | div      | ( a b -- c )   | c = (a / b)                  |
-| %    | mod      | ( a b -- c )   | c = (a % b)                  |
-| &    | and      | ( a b -- c )   | c = (a & b)                  |
-| \|   | or       | ( a b -- c )   | c = (a \| b)                 |
-| ^    | xor      | ( a b -- c )   | c = (a ^ b)                  |
-| <    | less     | ( a b -- c )   | c = (a < b)                  |
-| =    | equal    | ( a b -- c )   | c = (a == b)                 |
+| code | name     | stack effect    | semantics                    |
+|:----:|:---------|:----------------|:-----------------------------|
+| Q    | quit     | ( -- )          | Exit the process             |
+| C    | cell     | ( -- n )        | The size of Cells            |
+| h    | &here    | ( -- c-addr )   | The address of 'here' cell   |
+| l    | &latest  | ( -- c-addr )   | The address of 'latest' cell |
+| k    | key      | ( -- c )        | Read character               |
+| t    | type     | ( c -- )        | Print character              |
+| j    | jump     | ( -- )          | Unconditional branch         |
+| J    | 0jump    | ( n -- )        | Jump if a == 0               |
+| f    | find     | ( c -- xt )     | Get execution token of c     |
+| x    | execute  | ( xt -- ... )   | Run the execution token      |
+| @    | fetch    | ( a-addr -- w ) | Load value from addr         |
+| !    | store    | ( w a-addr -- ) | Store value to addr          |
+| ?    | cfetch   | ( c-addr -- c ) | Load byte from addr          |
+| $    | cstore   | ( c c-addr -- ) | Store byte to addr           |
+| d    | dfetch   | ( -- a-addr )   | Get data stack pointer       |
+| D    | dstore   | ( a-addr -- )   | Set data stack pointer       |
+| r    | rfetch   | ( -- a-addr )   | Get return stack pointer     |
+| R    | rstore   | ( a-addr -- )   | Set return stack pointer     |
+| i    | docol    | ( -- a-addr )   | Get the interpreter function |
+| e    | exit     | ( -- )          | Exit current function        |
+| L    | lit      | ( -- a )        | Load immediate               |
+| S    | string   | ( -- c-addr u ) | Load string literal          |
+| +    | add      | ( a b -- c )    | c = (a + b)                  |
+| -    | sub      | ( a b -- c )    | c = (a - b)                  |
+| *    | mul      | ( a b -- c )    | c = (a * b)                  |
+| /    | div      | ( a b -- c )    | c = (a / b)                  |
+| %    | mod      | ( a b -- c )    | c = (a % b)                  |
+| &    | and      | ( a b -- c )    | c = (a & b)                  |
+| \|   | or       | ( a b -- c )    | c = (a \| b)                 |
+| ^    | xor      | ( a b -- c )    | c = (a ^ b)                  |
+| <    | less     | ( a b -- c )    | c = (a < b)                  |
+| =    | equal    | ( a b -- c )    | c = (a == b)                 |