arduino Pin machine

hey everyone i'm new to arduino just bought my first starter kit and is anxious for it to be shipped.

I want to create something like a PIN Machine for a POS System. I want to create an arduino device that will allow the user to enter a numeric code and this code will be passed to the POS system via usb or wireless. The system will then do the additional processing basically I want to be able to pass data between the device and the POS system. Also what are the options available for custom housings for the device is there a website or someone who i can contact and they can design a housing for this device I am thinking of creating.

I'm new so any tips, cautions, recommendations and/or code will be greatly appreciated :)

I want to create an arduino device that will allow the user to enter a numeric code

An Arduino and a keypad are all you need.

and this code will be passed to the POS system

In the format that THE POS system expects, I presume. So, what format is that?

Also what are the options available for custom housings for the device is there a website or someone who i can contact and they can design a housing for this device I am thinking of creating.

Look in Products and Services. There have been several announcements about housings.

Thanks Paul, your reply helped a lot. In terms of the format that is to be passed between the system and the device i'm really unsure about the options. Im hoping to push across strings that way I can send JSON objects. Once again thanks for your help thus. Looking forward to hearing more from you.