After teasing the public for a while, Dell on Friday revealed an all-in-one computer that combines the monitor and CPU in one box.

The XPS One will be available as a system with only a widescreen display, a mouse, and a keyboard. Processing capabilities and other components will be fixed inside the display.

The systems will be available in four designs with the monikers indicating the target audience: the Essential One, the Music One, the Performance One, and the Entertainment One.

All systems will come with 20-inch displays, Intel Core 2 Duo processors, Windows Vista Home Premium, hard drives starting at 250GB, 2GB of memory, a TV tuner, and a remote control. The Music One system will come with wireless headphones for music enthusiasts.

The Entertainment One, designed as a home media center, will include a Blu-ray high-definition DVD burner. It will also come with an ATI Radeon HD 2400 Pro graphics card with 256MB of memory.

Popularized by Apple's iMac, all-in-one PCs also have been released by Hewlett-Packard and Gateway.

Dell plans to release the XPS One on Monday but posted details about it early online. 

An XPS One was visible onstage behind Michael Dell, CEO of Dell, when he addressed an audience at the OpenWorld conference last week. He didn't give details about the product at the time.

The product is on presale on Dell's Web site.