> -- Цитата:
> Operators and delimiters are the special characters, character pairs, or reserved words listed below. The reserved words consist exclusively of capital letters and cannot be used as identifiers... ABSTRACT... EXTENSIBLE ... LIMITED
## Код:
```
TYPE ABSTRACT = POINTER TO RECORD END;
VAR  EXTENSIBLE, LIMITED : ABSTRACT;
...
BEGIN
   EXTENSIBLE := LIMITED;
```

