A method for holding an object of interest in a field of view of a movable video camera, the object of interest being selected from a plurality of moving objects detected in the field of view, is taught. The source accounts can be, for example, credit card accounts, ATM accounts, debit card accounts, demand deposit accounts, stored-value accounts, merchant-loyalty card accounts, membership accounts, and identification card numbers. The input device may also include functionality to promote a secure physical connection between the input device and the computing device. The valves operate under positive and negative pressure generated by the syringe piston. The dotted line represents double bond or single bond.