Original scientific function calculator fx-991ms()
kwa shule za secondary kidato cha 3&4 katika michepuo ya ;
(science,arts na business).
kwa kidato cha 5&6(advanced level) katika michepuo ya; (egm,pcm,pcb,pgm,hge,cbg,cbn,cba,cbm n.k
1st edition bei
2nd edition bei