Surrounded by a bewildering array of credit card processing machines - for some reason each bank issues a different machine - he grins, teeth showing under a fine Turkish moustache.

BBC: Turks see silver lining in EU date

Instead, an external high quality dual-microphone array comes standard with this card.

ENGADGET: Creative reveals Sound Blaster ZxR, Zx, and Z PCI-Express sound cards, pumps up the volume

The Centurion card offers a wide array of benefits, including concierge services, luxury travel, dining, shopping and special events.

FORBES: Millionaire Credit Cards: What's In Their Wallets?

While his company has been doing some interesting work in Turkey, the whole sector is awash with a bewildering array of rival products from network operators, card providers and other payment providers.

WSJ: Predicting the Tech Future is a Difficult Thing to Do

Credit-card companies have long enticed users with an array of rewards programs, from airplane miles to hotel rooms and cash back.

WSJ: It's Easier to Return Those Unwanted Gifts

To process the payments, businesses must rely on third-party merchant service providers (MSPs), which offer a dizzying array of rate structures that range from a flat rate to a percentage of the amount charged to the card.

FORBES: Written by Robert Ziegler