Urupapuro ni urubuga rushimangira ubusesenguzi bwimbitse n’ibitekerezo by’ahejo.

Hifashishijwe amakuru agezweho, ay’ejo ndetse n’ibyo abasomyi bakwiye kumenya ku iterambere, itsinda ry’ubwanditsi rikusanya inkuru z’ingenzi n’ibitekerezo bishya buri cyumweru — bigasakazwa mu buryo bunyuranye; mu nyandiko, mu amashusho, ndetse rimwe na rimwe hakifashishwa n’amajwi.