Labels:bulletin board | monitor | paper | reckoner OCR: PUSHDOWN AUTOMATA FINITE ONTROL INPUT STRING: S Am F F.S.M CANNGY ACK uP STACK OPERATIONS READ + POP IGNORE HSnd GNORE STACK ALPHABET GAMMA MAY DIFFEYENT ALPHAB ET FROM /NPUT TRANS TIONS STATE DEPEWD CK TOP MAY NO STA MAY PU SH A70 THE STACK NON- DETERMINISTIC. CONTROL SteiNG SAME CANNGT NOUT SLTTE TRANSITIONS STAC