Handheld scanner
with a handle and typically a trigger button for switching on the light source.
Pen scanner (or wand scanner)
a pen-shaped scanner that is swiped.
Stationary scanner
wall- or table-mounted scanners that the barcode is passed under or beside. These are commonly found at the checkout counters of supermarkets and other retailers.
Fixed-position scanner
an industrial barcode reader, used to identify products during manufacture or logistics. Often used on conveyor tracks to identify cartons or pallets which need to be routed to another process or shipping location. Another application joins holographic scanners with a checkweigher to read bar codes of any orientation or placement, and weighs the package. Systems like this are used in factory and farm automation for quality management and shipping.
PDA scanner (or Auto-ID PDA)
a PDA with a built-in barcode reader or attached barcode scanner.