Appendix C. ASCII Codes
These codes for alphabetical and numerical characters are almost universally used in computing and other digital applications. The core of code illustrated here covers the numbers 32–127, using a maximum of 7 binary bits. This permits the use of parity for error checking within a single byte (8 bits). Extended ASCII uses numbers 32–255, permitting a wide range of characters such as accented characters, Greek, Hebrew, and Arabic characters, and other symbols, but these are not so strongly standardized. The best-known 8-bit set is the PC-8 set used on the IBM and clone computers.
The numbers have been given in both denary and binary forms. The table shows the UK ASCII set in which the £ sign is represented by 35. In the US ...