Electronics and back-to-school supplies are expected to top many shoppers' lists.

It's the last day of a major mid-summer retail sales event - Amazon Prime Day, which this year, for the first time, has stretched to four days. Many other retailers now embrace the sale, and it ...

It's the last day of a major mid-summer retail sales event - Amazon Prime Day, which this year, for the first time, has stretched to four days. Many other retailers now embrace the sale, and it offers ...

But Prime Day is now different. It went from two days to double that time, stretching Tuesday through Friday, giving shoppers a lot of space to poke around the website.