Government Auditing Standards (The Yellow Book) Add to favorites. Government Auditing Standards (the âYellow Bookâ) contains standards for audits of government organizations, programs, activities, and functions, and of government assistance received by contractors, nonprofit organizations, and other nongovernment organizations.
However, to make the numbers look bigger, a 1 TB HDD is displayed on the case in decimal numbers, meaning that 1 TB = 1000 GB. That is why the discrepancy between the numbers on the drive and the numbers that the OS reports from in the drive keeps increasing exponentially.
1 TB means Terabyte. It's equal to 1024 GB.  So an easy way to understand the amount of space it has is, suppose there's an HD movie of about 900+MB (~1024 MB = 1 GB). Your 1 TB hard disk can have around 1000 such movies and the 2 TB one can obviously have double of that.