Ledge type shelving - A shelving unit designed to accommodate two different depths of shelves. Larger shelves are placed at the bottom and the unit is stepped back with smaller shelves on top. This step back forms a ledge across the face of the shelf.
The shelving may be either open or closed type. In some instances, a ledge unit can be added to a regular shelving unit.

LES - Logistics Execution Systems manage inventory, space, material handling equipment, labor and transportation resources to assure timely, error-free fulfillment and visibility of order status throughout the supply chain.

Library shelving - A form of cantilevered shelving that is primarily utilized in application where ease of reconfiguration is necessary. This type of shelving is configured to satisfy book and technical manual storage requirements. Space between shelves can be expanded to accommodate taller items.

Lift - The maximum vertical distance through which the load hook can travel. The total allowable hook movement between its upper limit of travel and its lower limit of travel. The term "Lift" or "Lifts" may also refer to lift tables, scissor lifts and personnel lifts. Lift tables are ergonomic devices utilized to raise, lower or tilt work loads such as pallets and containers. Lift tables are a scissors lift device used to raise, lower, stack, convey and/or transfer material between two or more elevations and not limited to landings. Such movement enables the worker to access the load at an acceptable level so as to not exert undue physical strain while working with the item(s). A scissors lift is a raising/lowering device that is supported or stabilized by one or more pantograph leg sections. Likewise, personnel lifts are used to raise and lower humans to appropriate working heights so that they may work at a safe reaching level and will have benefit of increased movement not afforded by a conventional ladder.

Lift tables - A scissors lift device used to raise, lower, stack, convey and/or transfer material between two or more elevations and not limited to landing.