Ububiko Bwibitabo Hamwe Na Kote Yimanika Abacus nigikorwa cyibikorwa byinshi byububiko bwububiko bwibitabo hamwe na kote yimyenda ihumekwa nabashinwa abacus nuburinganire bwa steelyard. Abacus igizwe nibiti byimbaho ​​bifite impande zisukuye hamwe na gari ya moshi ebyiri. Udusimba tworoheje dushobora kugenda ku nsinga. Inkoni zirashobora kwihisha inyuma yumwanya, zishobora no gukoreshwa nkibitabo hamwe namanikwa. Abakoresha barashobora kandi kumanika ibintu hagati ya gari ya moshi. Abacus irashobora kwagurwa mugushiraho andi maseti.

Izina ry'umushinga : Abacus, Izina ryabashushanya : Wai Ho Cheung, Izina ry'abakiriya : Wai Ho Cheung.

Soma ibiganiro biheruka n'ibiganiro kubijyanye no gushushanya, guhanga no guhanga udushya hagati yumunyamakuru wubushakashatsi hamwe nabashushanyo bazwi kwisi yose, abahanzi nabubatsi. Reba ibishushanyo mbonera bigezweho hamwe n'ibihembo byatsindiye ibihembo byabashushanyo bazwi, abahanzi, abubatsi n'abashya. Menya ubushishozi bushya kubijyanye no guhanga, guhanga udushya, ubuhanzi, igishushanyo mbonera. Wige ibijyanye nigishushanyo mbonera cyibishushanyo mbonera.