ASCII stands for American Standard Code for
Information Interchange. Computers can only understand numbers, so an
ASCII code is the numerical representation of a character such as 'a'
or '@' or an action of some sort. ASCII was developed a long time ago
and now the non-printing characters are rarely used for their original
purpose. Below is the ASCII character table and this includes
descriptions of the first 32 non-printing characters. ASCII was
actually designed for use with teletypes and so the descriptions are
somewhat obscure. If someone says they want your CV however in ASCII
format, all this means is they want 'plain' text with no formatting
such as tabs, bold or underscoring - the raw format that any computer
can understand. This is usually so they can easily import the file
into their own applications without issues. Notepad.exe creates ASCII
text, or in MS Word you can save a file as 'text only'