From Stevens Creek Software:
On Hand is a powerful tool for performing inventories using a Palm Computing platform handheld device. Inventories can be taken manually on a standard unit, such as a Palm III, and can also be taken using the built-in barcode scanner of the standalone Symbol SPT1500 and SPT1700 units, and also with the Symbol CSM150 and PSC Momentum plug-in scanner modules for the Handspring Visor.
The software is designed to be entirely button driven, so that a complete inventory can be taken not only without requiring knowledge of Graffiti (tm), but without even using a stylus; this allows the user to hold the device in one hand while positioning items to be inventoried with the other hand. Inventories can be taken using a catalog of items which has been downloaded into the handheld device, in which case the items will be identified by name as seen at the left, or they can be taken "from scratch," collecting barcodes (and quantities) of any items at hand.