where is model number located
1 Tablet S: The model number is located on the back of the unit in the bottom-left corner. (e.g., SGP-T112US/S)  Tablet P: Gently remove the bottom / back cover. The model number is in the top-left corner, inside the compartment.
1 The model number is located on a small label located on the frame around the computer screen. (e.g., VGN-FW550F)  The computer information and compliance label, located on the bottom of the laptop case, indicates the actual model number. (e.g., PCG-N505VX)