Abstract: A software management structure is disclosed. A software application package is made up of several linked replaceable units (RU). Each RU is serviceable without adversely effecting the other RUs. The RUs are linked together in a hierarchical fashion in a series of levels. In the preferred embodiment, five levels are used: Application Group level (AG), Loadable Code Group level (LCG), Primary Functional Group level (PFG), Secondary Functional Group level (SFG), and Operational Code Group level (OCG). The AG level defines a group of computer programs combined to perform a high level application tailor fit to meet the needs of the user. The LCG level defines individual programs each created to perform a general task. The PFG level refines the common programs defined in the LCG level to a more specific set of primary functions. The SFG level refines the primary functions defined in the PFG level to an even more specialized set of secondary functions tailored closely to fit a specific user's needs.

Abstract: A software management structure is disclosed. A software application package is made up of several linked replaceable units (RU). Each RU is serviceable without adversely effecting the other RUs. The RUs are linked together in a hierarchical fashion in a series of levels. In the preferred embodiment, five levels are used: Application Group level (AG), Loadable Code Group level (LCG), Primary Functional Group level (PFG), Secondary Functional Group level (SFG), and Operational Code Group level (OCG). The AG level defines a group of computer programs combined to perform a high level application tailor fit to meet the needs of the user. The LCG level defines individual programs each created to perform a general task. The PFG level refines the common programs defined in the LCG level to a more specific set of primary functions. The SFG level refines the primary functions defined in the PFG level to an even more specialized set of secondary functions tailored closely to fit a specific user's needs.

Abstract: A windshield wiper assembly for use with a driven wiper arm for cleaning a windshield comprises a wiper blade arm assembly adapted to be mounted to the driven wiper arm and including an elongated support frame, an elongated blade carrier pivotally mounted to the support frame, and first and second blades mounted to the blade carrier. Means are provided for pivoting the blade carrier between a first position in which the first blade is positioned for contacting the windshield and the second blade is positioned to be spaced from the windshield and a second position in which the first blade is positioned to be spaced from the windshield and the second blade is positioned for contacting the windshield. By making the blades of different compositions, different cleaning tasks can be effectively accomplished, as for example removing ice or insects. Alternatively, a wiper blade comprises two sections made of different materials.