1. A method of merging a first set of data objects and a second set of data objects for displaying on a display screen, the method comprising: retrieving a first identifier associated with a first memory location, the first memory location for storing the first set of data objects; retrieving a second identifier associated with a second memory location, the second memory location for storing the second set of data objects; comparing the first identifier and the second identifier; and grouping one or more first data objects from the first set of data objects and one or more second data objects from the second set of data objects based on the comparison.