Abstract: A chemical dispensing system is provided having a micro-controller and at least one expansion module. The expansion module includes an expansion module interface. The expansion module is in communication with the micro-controller via the expansion module interface. The at least one expansion module expands capabilities of the chemical dispensing system beyond a base operation of the device.

Abstract: A chemical dispensing system is provided having a micro-controller and at least one expansion module. The expansion module includes an expansion module interface. The expansion module is in communication with the micro-controller via the expansion module interface. The at least one expansion module expands capabilities of the chemical dispensing system beyond a base operation of the device.

Abstract: A system and a method for a mileage (or other distance measurement) logging apparatus (or portable mileage logger) is configured as an electronic device, which keeps track of the vehicle's mileage. The mileage logger is independent of the vehicle's electrical and sensor systems, although it may also be configured to tap a vehicle's power connection. The mileage logger is configured for portability. Hence, it can be transferred from one vehicle to another and removed from the vehicle without the need for disabling and re-wiring. Moreover, the mileage logger may be configured with input/output ports to connect with a personal computer to download data from the apparatus. Alternative embodiments of the mileage logger may also be configured to include wireless network capabilities with an electronic mail protocol that allows for automatic wireless transmission of e-mailing capability to a user's computer, utilizing wireless network connections.