Unveiling its first ever tablet PCs, S1 and S2; Sony has effectively launched a salvo into the ongoing tablet wars.

The Japanese electronics and entertainment giant's tablet computers will be able to download videos, music and other entertainment and be compatible with existing PlayStation games, Sony official Kunimasa Suzuki said in a news conference. Both use the Google Android 3.0 operating system, known as Honeycomb.

The Sony Tablet S1 has a 9.4 inch (24 centimetre) screen, and front and rear cameras. S1 is intended for the home. The folding clamshell S2 is a portable device with dual 5.5 inch color touchscreens and fits into a pocket.

This design is particularly relevant for reading digital books whose content is displayed on screen as two pages side-by side, Suzuki said.

Since the impressive creation of a tablet market by the technology giant Apple, several players have entered the market to challenge what would otherwise be a monopoly of the iPad. Sony's table devices also come in line with the massive interest the gadget has garnered across the globe fueled by the competition.

Scroll down to see photos of Sony's tablet computers S1 and S2: