Tira d tanagrawt n tgensest unuɣen (graphique) n tutlayt deg ubrid n uwehi yesuneɣ af usened (support) amedya : tawriqt, d tawil n ubdel n isalen usend n ṣut, s usenulfu n tira ad nsebeggen adaw (frontière) gar azamezruy d umezruy.tira ala nettat id tawil n usikel (transmettre) n tmusni. Af a ya, amdan dima i tenadi ad isemɣur tawilat n tira. Timetti-neɣ txedem amḍan ameqran n isemliyen ( documents) yuran, tibratin, adlis, lcakk, aneɣmas…