The number of computerized cash registers using the Linux operating system grew by 185 percent in 2002, according to a study released Wednesday, but Linux still has only 4 percent of the overall market.

Linux lags Microsoft Windows, which has 69 percent of the total market for point-of-sale terminals, and IBM's 4690 operating system, with 17 percent, according to a study by IHL Consulting Group.

"Linux is starting to gain traction in several segments, such as restaurants...but at only 4 percent of total shipments in 2002, it still has a long way to go before being a serious contender," IHL President Greg Buzek said in a statement. In addition, few companies that embraced Linux decided to do so across their entire chain of stores, the study said.

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