Hertz measures cycles per second - one Hertz is one cycle per second. Unlike gauss that is a measurement unit for the strenght of a specific thing (an electromagnetic field), hertz is a generic frequency measurement.
Prepend is a word that means to attach content as a prefix. It is often used in different kinds of programming and in automated processes. Some prepending is done manually as a user. For example, a prepend command could be used in a scripting language that a programmer would enter into a certain function or code module. It would add certain characters of text to the beginning of some variable or object.
a package assembled by a manufacturer, distributor, or retailer and containing a specific number of items or a specific assortment of sizes, colors, flavors, etc., of a product. verb (used with object) 2. prepackage. Origin of prepack.