Abstract: A point of sale system comprises at least one point of sale terminal arranged to receive an identifier for identifying customer account information associated with a customer and for identifying a first set of products and determining a first price for the first set of products. The point of sale system is further arranged to identify a second set of products based on the first set of products and determine a second price for the second set of products, determine a quantity of reward points in dependence upon the determined first and second prices, and to modify the identified customer account information based on the determined quantity of reward points.

Abstract: A portable computer is disclosed which includes hierarchical operating systems. The computer includes a handheld operating system to operate the portable computer as a handheld device. It also includes a laptop operating system to operate the portable computer as a laptop computer. The laptop operating system is responsive to a first command to boot-up the handheld operating system. The handheld operating system is responsive to a second command to boot-up the laptop operating system.