Online Business Accounting

What is the most popular accounting software for business use?

I am wondering what the most widely used business accounting software is? Or which programs would be the best to know?

Public Comments

1. excel & quickbooks seems to be what all the craigslist ads are requiring experience in.
2. QuickBooks and Peachtree are the biggies for small businesses. You should also be familiar with Word and Excel. Most others a company will train you on if necessary.