The use of the binary system in digital systems is as old as the invention of the computer. Texts are stored on computers as bit sequences (1 and 0) and interpreted by software according to character standards (ASCII, UNICODE, UTF-8 etc.). One of the oldest character standards is ASCII ‘American Standard Code for Information Interchange’, which was presumably the most common for the Americans. Unfortunately, the displayable part of this standard only includes characters in the English language; among other things, there are no umlauts, which is why developers have largely switched to UTF-8 (an international encoding that is backwards compatible to ASCII).
Each character of an ASCII text is represented as a 7-bit numeric value.
The following table shows all ASCII characters together with their corresponding numeric value.
EN 
DE