| Base Arithmetic | Explains what bases are all about, particularly base 2 and base 16 | 
| Character Codes | Tables for ASCII and EBCDIC codes for characters | 
| DOS Commands | Listing and explanation of useful commands for the DOS command line | 
| Header/Footer codes | Lists those codes using the ampersand (&) for printing things like the date, page number, or file name onto your document header or footer. | 
| Glossary  | 
        Definitions of keywords and technical terms |