RE: HELLO WORLD (I'm new here :)

Hi @nataliatothemoon! Those commands are "Tokens" that are native to the HIVE ecosystem. You can buy them, stake them or trade them.

If you go to https://tribaldex.com/ (which you can access with your HIVE account), there you can see all the tokens you have. At the beginning you won't have many but with time you will have a bunch of them