The ASCII character encoding provides for a simple methode of representing 
numbers from 0 to 32 as the characters @ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_.
This encoding is already used when pressing control and one of these
characters to produce the control code with that number.
This set of 32 characters is inherent to many terminal drivers, and
to the ASCII encoding which is a ubiquitous standard.
Hence, the encoding for numbers and binary data which uses the
characters @ thru _ in this manner may be called Machine-32.