The previous entry ended on the note that to discuss file sharing, there must be some discussion of first sale in the age of digital content. At base, first sale is a straightforward concept. A copyright-holder has the exclusive right to make and sell copies of the work, but that right to sell is exhausted after the first sale. Once a consumer has purchased a copy, she has the right to resell the copy, give it away, lend it out, or even destroy it. First sale typically makes content both more available and more affordable. Content is made more affordable by the creation of secondary markets for used copies. Libraries also rely on first sale rights to lend copies to the public (or to members, students, etc), lowering the cost of access by distributing the cost of copies over a population (of tax-payers, tuition-payers, etc). First sale increases availability of content by allowing the owners of copies to continue to circulate (through sale or gift) their copies even after the work is...