PlayStation 1

The original model design with DualShock and logo of the PlayStation.

The PlayStation , Officially abbreviated as PS1 which is a 32-bit fifth-generation video game console first released by Sony Computer Entertainment in Japan on December 3 1994.PlayStation was the first computer entertainment platform to ship 100 million units to all over the world.

Early development

Back in 1986, Nintendo had been attempting to work with disc-based technology since the Famincom, but there is some problems. The Famicom Disk System's rewritable magnetic discs could be easily erased thus leading to a lack of durability, and they lacked any sort of copy protection, thus were vulnerable to piracy.  

Consequently, when details of CDROM/XA which also has those problems were released to the public, Nintendo was interested to approached Sony to develop a CD-ROM add-on, tentatively titled the "SNES-CD" . Simultaneously developed by Sony and Philips, CD-ROM/XA was an extension of the CD-ROM format that combines compressed audio, visual, and computer data, allowing all to be accessed simultaneously. 

An original PlayStation control pad. This model was later replaced by the DualShock.

Function

In PlayStation has the ability to read and play audio CD's only.

• Able to shuffle to playback order
• Play songs in programmed order
• Able to repeat one song or whole disk.  

This function, as well as a memory card manager, can be accessed by starting the console either without inserting a game or keeping the CD tray open, thereby accessing a system menu. The CD lid is closed with a game inside at any time while at the menu, the game will immediately start.

Here is the example of playstation game, enjoy..

Reference: http://en.wikipedia.org/wiki/PlayStation#History