0000912057-01-510090 DEF 14A 1 20010524 20010424 IRON MOUNTAIN INC/PA 0001020569 4220 232588479 PA 1231 DEF 14A 34 001-13045 1609268 745 ATLANTIC AVENUE BOSTON MA 02111- 6175354766 745 ATLANTIC AVENUE BOSTON MA 02111- PIERCE LEAHY CORP 19960807 DEF 14A 1 a2045439zdef14a.txt DEF 14A