One of the "two models" which is well represented within those spatial and temporal limits is what we shall call ITEM AND PROCESS, or IP for short; the other we shall call ITEM AND ARRANGEMENT, or IA. - Hockett (2004b), a pag.110
The essence of IA is to talk simply of things and the arrangements in which those things occur. - Hockett (2004b), a pag.112