The video walks you through the essentials here, how binary represents decimal, how that’s represented in hexadecimal, and why exactly computers need all that to begin with.

Girls Who Code is an international program that helps introduce elementary-aged girls and older to the language of coding.

Way before that, in 1949, Grace Hopper programmed the Binac (Binary Automatic Computer) at the Eckert-Mauchly Computer Corp. using octal code.