Unit load is a term used to describe grouping of different items into a convenient stack or stacks which make them easy to handle and store. Typically this involves pallets and/or the plastic wrap-ping of a load.
Stacker is designed to lift and stack pallets. This one is fully mobile so can move easily around the warehouse.
An operator would typically sit or stand while driving like a counterbalanced, reach or straddle lift truck.
A load cell is a type of transducer, specifically a force transducer. It converts a force such as ten-sion, compression, pressure, or torque into an electrical signal that can be measured and standard-ized.
Unit price is the price of a single product or service, used for example when buying several things together to refer to the price of each one.