The electronics giant is expected to launch its in-store product reservation system, Personal Pickup, for the iPhone 5 tonight at 10 p.m. ET, according to 9To5 Mac. Customers can access the system through Apple's store app or Web site between 10 p.m. and 4 a.m. each night to reserve available iPhone 5 inventory for the next day, 9To5 Mac said.

Apple has utilized reservations in years past. The system provides buyers with a way to secure a device without having to wait in line for long, or show up at a store that does not have the model they want in stock. Apple has also used the system with product launches, though it ceased that process due to a need for two separate lines at its retail locations.