This range included common symbols and some internationalized versions of the American English alphabet. The first expansion, called extended ASCII, used an 8-bit representation and extended to the range of 0-255. With the rise of 16, 32, and 64-bit machines, ASCII has seen several significant expansions over the years. As such, attempting to use these characters for non-control functions typically results in the display of a default missing character symbol or other unwanted (and irrelevant) characters. The ASCII-encoded characters for decimal values 0-31 do not print or render to displays like other characters. These are referred to as control characters and were originally intended as machine control signals to trigger events like system sounds (beep), network acknowledgments (ACK), and end of text (EOT). Note the first 32 characters, decimal values 0-31, have been reserved for non-display characters. By the late 1980s, the American National Standards Institute (ANSI) had assumed oversight of the ASCII standard. It was originally developed in the early 1960s as early networked communications were being developed.Ī 1969 RFC20 outlined the recommendation for adopting this 7-bit system for numerical representation within network interchange. The American Standard Code for Information Interchange (ASCII) is a means of encoding characters for digital communications. Printable ASCII Table (Click to Enlarge) ASCII Table
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