Final answer:
The popularity of the Apple II personal computer was largely due to a piece of software called VisiCalc, which was the first electronic spreadsheet software.
Step-by-step explanation:
The popularity of the Apple II personal computer was largely due to a piece of software called VisiCalc. VisiCalc was the first electronic spreadsheet software and it revolutionized the way people could organize and analyze data. It allowed users to create budgets, financial forecasts, and perform complex calculations with ease.