Abstract: A system for defining products and billing for the same includes a server and an associated database. The server has programming to provide an interactive wizard which is used define and modify: a first data set including data indicative of a plurality of products to be offered to a customer; a second data set including data indicative of product bundles including selected ones of the plurality of products to be offered to a customer; a third data set including data indicative of prices associated with the plurality of products and product bundles; a fourth data set including data indicative of how the plurality of products and product bundles are to be billed to a customer; and a fifth data set including data indicative of how the plurality of products and product bundles are offered to a customer for purchase. The database stores the data sets and a mapping therebetween.

Abstract: The measuring system of the disclosure has two oscillators of different frequencies. The oscillations of the high frequency oscillator are counted for a time corresponding to a portion, for example one-eighth, of the period of the low frequency oscillator. If the count is less or greater than a selected count, for example 4,096, the frequency of the low frequency oscillator is corrected by approximately one high frequency period in the one-eighth low frequency period. By this method the oscillators are brought into near-synchronism, so that there are counted exactly 4,096 high frequency oscillations during the one-eighth period of the low frequency oscillator, but neither 4,097 or more, nor 4,095 or less. The correction is accomplished by excluding or including one at a time, various resistors in the frequency determining portion of the low-frequency circuit by the use of transmission gates in parallel with the resistors. The system may be used to measure, for example, weight.