My take: 1-13) General background info that informs the rest. 14-25) Important for any programmer that does enough file IO that they need to optimize it. 26

My take: 1-13) General background info that informs the rest. 14-25) Important for any programmer that does enough file IO that they need to optimize it. 26-29) Important for any system admin to ensure they aren't inadvertently limiting the performance of their hardware.