Which one is used for multiplying a single digit number with a long number Click a link to vote: Abacus 👉 https://pollie.app/lqig9 Napier Bones 👉 https://pollie.app/qqh7x To download pdf notes of these lectures, Join the telegram channel "Knowledge CS Plus One" Telegram Channel Link: https://t.me/knowledgecs1 For Doubts clearance contact: 8089369239 (WhatsApp Only) Plus One Computer Science Chapter 1- Discipline of Computing- Full Playlist Link:    • PLUS ONE COMPUTER SCIENCE   Topics covered in the video: Evolution of Computing Machines: Abacus Napier's Bones #plusonecomputerscience ,#disciplineofcomputing, #abacus