A programmable food service system including one or more food service devices
and
at least one data key. Each data key is provided with a data memory for storing
program data corresponding to sequences of food service operations. Each food service
device includes a programmable controller for controlling the food service device
to carry out sequences of cooking operations. Each food service device includes
a key aperture adapted to receive a data key and a data reader arranged to read
program data from the data key memory. The program data is passed on to the programmable
controller, thereby making the appropriate sequences of cooking operations available
to the food service device.