What is a short program call from the terminal called?

Question

ubuntu

I installed, for example, sublime, with the command sudo apt-get install sublime-text-installer.
The installation was successful and now I can run sublime from the terminal, wrote subl. But what I need to write is subl, I learned from Google. What is it called and how can you find out for which program what abbreviation and what abbreviations are there?

Answer 1

This is not an abbreviation, but the name of the binary.
Available binaries to look at:

/bin
/sbin
/usr/bin
/usr/local/bin
/opt

Third party programs are usually installed in /usr/local/bin or /opt