Imfashanyo yo kumva

Imfashanyo yo kwumva nigikoresho cyagenewe kunoza kumva mukumva amajwi kumuntu ufite

ikibazo cyo kutumva. Imfashanyigisho zo kumva zishyirwa mu ibikoresho by'ubuvuzi mu bihugu byinshi, kandi bigengwa n’amabwiriza abigenga. Amajwi mato mato nk'ibicuruzwa  byongera amajwi (PSAP) cyangwa ubundi buryo bworoshye bwo kongera amajwi ntibishobora kugurishwa nk "ibyuma bifasha kumva".