I carry an iPad 4 and 2 iODD's (one for Windows, one for iOS). In the vehicle, I have an HP laptop just in case. I have a Brother printer as well for AirPrint in case they want a full invoice instead of a text or emailed receipt. I have a Chevrolet Sonic LS and in the back are a series of storage containers with parts from ram, hdds, PSU's to motherboards. Fully loaded mobile business so I am always prepared. I have AMD and Intel so I am covering anything that could go wrong, has gone wrong. This saves me time from having to either order parts or travel to Dallas, TX to my distributor. 90% of service calls are solved with just my iODD however. iPAD is used for mobile POS.