PL/C programming language

PL/C is a large subset of IBM's PL/I language, designed in the early 1970s at Cornell University. It was intended to be a teaching language, aimed at novice programmers. While removing some of the more complex features of PL/I, it added extensive debugging and error recovery facilities.

PL/SQL is a query language used by the Oracle DBMS which adds to SQL standard programming control structures such as loops and if/then statements.