Hand-held games consoles: from Pac Man to PS Vita

22 February 2012 Last updated at 16:37 GMT

Newsbeat looks back at how hand-held games consoles have changed over the years.
PlayStation Vita
Technology experts say the PS Vita, which was released on Wednesday, could be the last dedicated hand-held games console. Newsbeat takes a look back at how they have evolved over the years.
Atari Touch Me
The Atari Touch Me, which was originally an arcade game, was released as a hand-held console in 1978.
Pac Man 2
Pac Man was released in 1980 and quickly became one of the most popular arcade games of all time. It was later made into a hand-held games console called Pac Man 2 - because it could be played by two people at the same time.
Nintendo Donkey Kong
Nintendo's Donkey Kong, released in 1982, was one of the first iconic hand-held games devices to capture the public imagination.
Arcade Defender
The Arcade Defender was released in 1982. It had a 'speed control' feature (top right) which was used to speed up or slow down game play.
Nintendo Game Boy
The Nintendo Game Boy was released in 1989 and quickly became a huge hit around the world. A colour version was released in 1998.
Nintendo Game Boy Advance
The Nintendo Game Boy Advance went on sale in 2001. It sold well, but was less popular than the earlier Game Boy models.
Nintendo DS Lite
Nintendo launched the DS in 2004. The device featured two screens (DS stands for dual screen), one of which is a touchscreen. A "Lite" version of the DS was released two years later.
PSP
The PlayStation Portable - or PSP for short - was released in 2005. Sony, who manufactured it, said the console has sold more than 75 million units.
Smartphones
Many smartphone users use their devices to download and play games. Angry Birds, for example, has been downloaded more than 500 million times. It's thought the popularity of smartphone gaming has damaged the sales of hand-held games consoles in recent years.
Samsung tablet
Tablet computers have also become a popular gaming platform.
Nintendo 3DS
After the success of the DS and DS Lite, Nintendo launched the 3DS last year. The device's appearance was similar to previous DS models, but the console had capabilities to play 3D games without the use of glasses.