Main Page | See live article | Alphabetical index In computer science (or more likely, in computer underground terminology) alphanumeric code is machine code that is written entirely in readable ASCII-letters such as "a"-"z", "A"-"Z", "1"-"9", "#", "!", "@", etc. This is possible to do with a (very) good understanding of the assembly language for the specific computer that the code is intended for. This code is used by crackerss with the intent of fooling applications, such as Web forms, into accepting code used for exploits. Typically, such exploits involve buffer overflows. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.