COTTONWOOD, Ala. (AP) — A south Alabama man found private information about hundreds of medical patients — including his late grandfather — when he turned on an old IBM computer he purchased for $10 at a flea market.

Shawn Peterman bought the machine Sunday at Sadie's Flea Market and, when he started it later that day, a program called "Doctor's Office Manager" popped up with information on former patients of Dothan Pulmonary Associates.

The information appeared to have been entered around 1995, and a summary screen listed the number of patient records at 3,333. Included in the information were patients' names, addresses, phone numbers, Social Security numbers and insurance information.

A quick search led him to information about his grandfather, who died six years ago.

"I can't tell you how upset I am," said Peterman, of Cottonwood. "Literally, there was everything there that someone would need to steal someone's identity."

Peterman is an admitted "computer geek," but he said the information would have been easily accessible to anyone.

Dothan Pulmonary Associates is no longer open. The two primary physicians listed on Peterman's computer were Greg Shields and Brian Sinclair.

"I can't imagine how something like that could happen," Shields said. "We make efforts to delete things and clean things up."

Peterman said he took a quick glance at only one or two files and plans to delete the information before using the computer.