Symbols for Legacy Computing Supplement is a Unicode block containing additional graphic characters that were used for various home computers from the 1970s and 1980s.
It includes characters from Amstrad CPC, Apple 8-bit, Kaypro CP/M, Mattel Aquarius, Ohio Scientific, Robotron KC, Sharp MZ computers, HP terminals, and TRS-80.
It includes a set of semigraphics in the form of 230 "octant" characters, large images split into four "characters", and the "large type" characters used for building large text characters.
[3] The following Unicode-related documents record the purpose and process of defining specific characters in the Symbols for Legacy Computing Supplement block: The glyphs for Symbols for Legacy Computing Supplement block were added to Cascadia Code,[4] GNU Unifont[5] and Iosevka[6] fonts.