Internet users spent more than $500 million during Thanksgiving week (Nov. 22-28), nearly doubling what they spent the preceding week, according to a Goldman Sachs/PC Data Online study.

Significant increases in the number of buyers occurred in nearly all major categories. The survey questioned 3,084 home-based Internet users about their Web buying.

"What's most impressive about this jump was the increase in buying across all categories," said Cameron Meierhoefer, Internet analyst for PC DataOnline. He said 40 percent of the respondents said they planned to begin online shopping after Thanksgiving weekend.

"We have been tracking brick-and-mortar sales for many years. If similar buying patterns exist on the Internet during this holiday season, then I expect that more than 70 percent of spending is yet to come between now and the end of the year," Meierhoefer said.

FOLLOW THE MONEY

Spending by online shoppers in selected categories.

Weeks ended Oct. 30 through Nov. 28, in millions of dollars

Computer hardware

Oct. 31: $35.0

Nov. 7: $58.8

Nov. 14: $37.3

Nov. 21: $81.8

Nov. 28: $119.1

Travel

Oct. 31: 35.2

Nov. 7: 32.0

Nov. 14: 35.9

Nov. 21: 22.0

Nov. 28: 87.5

Toys

Oct. 31: 10.6

Nov. 7: 12.9

Nov. 14: 14.1

Nov. 21: 19.9

Nov. 28: 62.0

Computer software

Oct. 31: 19.5

Nov. 7: 25.5

Nov. 14: 21.9

Nov. 21: 28.7

Nov. 28: 55.0

Appare

Oct. 31: l8.9

Nov. 7: 10.5

Nov. 14: 11.9

Nov. 21: 13.9

Nov. 28: 41.9

Books

Oct. 31: 6.8

Nov. 7: 7.9

Nov. 14: 7.4

Nov. 21: 9.7

Nov. 28: 28.0

Music

Oct. 31: 6.7

Nov. 7: 11.4

Nov. 14: 12.7

Nov. 21: 8.5

Nov. 28: 22.6

Videos/DVDs

Oct. 31: 5.7

Nov. 7: 7.0

Nov. 14: 6.5

Nov. 21: 6.3

Nov. 28: 16.4

Health and beauty

Oct. 31: 5.3

Nov. 7: 4.7

Nov. 14: 5.4

Nov. 21: 8.8

Nov. 28: 12.6

Flowers/cards

Oct. 31: 4.0

Nov. 7: 3.4

Nov. 14: 3.8

Nov. 21: 2.4

Nov. 28: 8.2

SOURCE: Goldman Sachs/ PC Data Online