A system forecasts parking availability for a time in the future based on driver-reported estimations of how long each vehicle in the parking area will stay and on forecasted arrivals. On the basis of the histogram, a level or levels are changed of at least part of the pixels of the multivalued image data. This increases the total width of the depletion region of the MOS varactor to reduce Cmin. The tabs are bent into close contact with the leg of the kickstand, with the supporting pad located beneath the distal end of the kickstand. Transaction types supported include those suitable for off-line credit cards, in which the open to buy is maintained on the card.