The original COCOMO 81 model was defined in terms of Delivered Source Instructions, which are very similar to SLOC. The major difference between DSI and SLOC is that a single Source Line of Code may be several physical lines.
awali COCOMO 81 mfano ilipewa katika suala la Mikononi Maelekezo Chanzo, ambayo ni sawa na SLOC. tofauti kubwa kati ya DSI na SLOC ni kwamba moja Chanzo Line ya Kanuni inaweza kuwa na mistari kadhaa ya kimwili.