So...

When working with files in the command line, it is easy to lose track of what 
you are doing.
A helpful convention is to leave a README file in any directory where you have 
a lot going on. 
This would generally help you to keep track of things. 
For example, this directory `b` doesn't contain anything other than this README 
file.

Another thing you should note: See how these lines only have less than 
characters per line?
That is a tradition to keep files readable, because old 'terminals' - which 
were the only access to computers back when they required rooms or buildings - 
were usually just over 80 characters wide. 

Something else that is often done is to write each sentence on its own line.
This allows you to edit line by line, and will become very important
when we start working on merging different files later.

Raise your hand as soon as you've read this file.