Final answer:
The spreadsheet program was the key application that first made personal computers attractive to businesses, revolutionizing business practices in the early 1980s by enabling efficient data analysis.
Step-by-step explanation:
The Key application that first made personal computers more attractive to business was the spreadsheet program. In the late 1970s and early 1980s, as personal computers became more common in businesses and homes, applications such as word processors and desktop publishing began to emerge. However, it was the introduction of the spreadsheet program, VisiCalc, for the Apple II in 1979, which truly revolutionized business practices. The ability to perform complex calculations and data analysis quickly and efficiently made computers indispensable in the business world. This led to a dramatic increase in the adoption of personal computers in the business sector during the early 1980s.
While other technologies like email, the World Wide Web, desktop publishing, and video editing played a role in popularizing personal computers, it was the spreadsheet application that initially drove their business use. The flexibility and productivity gains offered by spreadsheet programs are what convinced businesses that personal computers were a necessary investment, sparking widespread integration into office environments well before the advent of the other applications mentioned.