Extended ASCII in the context of Code page 437

In computer architecture, 8-bit integers or other data units are those that are 8 bits wide (1 octet). Also, 8-bit central processing unit (CPU) and arithmetic logic unit (ALU) architectures are those that are based on registers or data buses of that size. Memory addresses (and thus address buses) for 8-bit CPUs are generally larger than 8-bit, usually 16-bit. 8-bit microcomputers are microcomputers that use 8-bit microprocessors.

The term '8-bit' is also applied to the character sets that could be used on computers with 8-bit bytes, the best known being various forms of extended ASCII, including the ISO/IEC 8859 series of national character sets – especially Latin 1 for English and Western European languages.

In the Warez scene, .nfo (short for info) is a file name extension for a text file (sometimes called an NFO file) that accompanies and describes a release of pirated software or media. The file contains information such as title, authorship, year and license information. For software, it might contain installation notes. This information is delivered for publishing through digital media to make it searchable on the web as well as within local catalogues and libraries. This type of file is also often found in a demoscene production, where the respective group includes it for credits, contact details, and the software requirements.

This type of file has been described as the press release of the warez scene. Info files were ubiquitous, and sometimes required, during the era of the Bulletin Board System (BBS). The file was a stamp of authenticity, explicitly explaining what group released the software and described what modifications (or cracks) were applied if any. Once a software was packaged with an info file and then released, it was then officially owned by that group and no other group could ethically re-release that particular package. A typical warez info file was elaborate and highly decorated, and usually included a large ASCII art logo along with software release and extended warez group information. The most important information is which group, which cracker and which member actually tested and packaged. The designers of these info files, who worked closely or within the warez groups, frequently incorporated extended ASCII characters from the character set code page 437 in the file.