When Rousseau wrote his social theory, concepts of liberty and freedom were not new ideas. Hints of social contract reasoning are found in earlier works, most notably in Book 2 of Plato's dialog The Republic, as well as, in Socrates.
The total spending per iTunes account is $43 per year across all media, says Dediu. At 575 million iTunes accounts, that works out to $24.7 billion of consumer spending at iTunes per year. The average iTunes account's annual spending on software has followed music's trend, falling to $9 from $42 in 2008. However, average annual spending on apps has gone in the opposite direction, rising to $16 this year from $7 in 2008.
Open an iTunes account (Apple ID) to purchase media such as music, movies, audiobooks, podcasts, and so on. Install iTunes on your computer, and setup an iTunes account to create the Apple ID. With it, you can log onto iTunes, purchase and download media onto your computer, and synch (transfer) that media to your iPad.