All the tablets versions have a USB dongle for connecting it to computer.
Wacom co is the most popular company in making different types or versions of graphic tablets like Bamboo,Intuos,Cintiq,Inkling etc.Bamboo version is the cheapest and is ideal for a beginner level or amateur artist and the commonly used models are Bamboo Create, Bamboo Capture, Bamboo Splash and Bamboo Connect.Intuos is designed for professional artist or cartoonist and offers 5080 inches per resolution.Clintiq is a hybrid and advanced graphics tablet which has a built in LCD display so that the user can draw on the surface directly.Inkling was launched in the year 2011 to convert the images on paper to digital one. It is used to draw images and graphics using a stylus (looks like a pen) like how we draw pictures on a piece of paper using a pen or pencil.It is also called digitizer as it is also used to scan or trace the image on a piece of paper.It is mainly used by the cartoonists for drawing the figures.There are many companies who manufacture the graphic tablets like Havon Co,IBall,Kanvus Co,Wacom co etc. Graphics tablet is an input device similar in appearance to a tablet computer but its functionally it is different.