system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did the first computer get programmed?

How would they know what language to use? How would the computer know what to do with the programs?
gpt
There were no languages. The first computer programs were made in binary, with programmers choosing each 0 or 1 to get the effect they want. 

Naturally, some of the first computer programs ever made were compilers for programming languages, because flipping bits to get stuff done is a huge pain in the ass.