Hexadecimal close hexadecimalA number system using 16 symbols from 0-9 and A-F, also known as base 16 and hex., also known as hex, is the third commonly used number system. It has 16 units - 0-9 ...

Facebook on Thursday started allowing users to self-identify as something other than male or female. Good. There may be some cynical ad-targeting motive at work, but as Facebook spokesman Will ...