Abstract: A lift adapted to be attached to a rolling ladder having a frame including first and second spaced-apart frame members mounted on wheels and between which are attached a series of inclined ladder steps. The lift includes a base on which is mounted a lift motor, a vertically-extending mast positioned on and extending upwardly from the base, and a load-carrying lift platform mounted on the mast and adapted for motor-powered movement of the lift platform and load up and down the mast. At least one laterally-extending attachment member is carried by the mast and adapted to be attached to the first and second spaced-apart frame members for attaching the lift to the rolling ladder. The attachment member is width-adjustable to permit the lift to be attached to rolling ladders of different widths.

Abstract: A mass storage system made of flash electrically erasable and programmable read only memory (“EEPROM”) cells organized into blocks, the blocks in turn being grouped into memory banks, is managed to even out the numbers of erase and rewrite cycles experienced by the memory banks in order to extend the service lifetime of the memory system. Since this type of memory cell becomes unusable after a finite number of erase and rewrite cycles, although in the tens of thousands of cycles, uneven use of the memory banks is avoided so that the entire memory does not become inoperative because one of its banks has reached its end of life while others of the banks are little used. Relative use of the memory banks is monitored and, in response to detection of uneven use, have their physical addresses periodically swapped for each other in order to even out their use over the lifetime of the memory.