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, 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:
Anderson, Deborah; Whistler, Ken; Pournader, Roozbeh; Constable, Peter (2022-01-22), "17 Legacy Computing Symbols", Recommendations to UTC #170 January 2022 on Script Proposals
Constable, Peter (2023-02-01), "Consensus 174-C24", UTC #174 Minutes, The UTC accepts the name change for U+1CE35 from LARGE TYPE PIECE RAISED UPPER RIGHT ARC to LARGE TYPE PIECE RAISED UPPER LEFT ARC
Anderson, Deborah; Kučera, Jan; Whistler, Ken; Pournader, Roozbeh; Constable, Peter (2023-07-21), "13 Symbols for Legacy Computers Supplement", Recommendations to UTC #176 July 2023 on Script Proposals
Constable, Peter (2023-07-31), "Consensus 176-C37", UTC #176 Minutes, Change the name of U+1CE07 TOP RIGHT BLACK LEFT-POINTING SMALL TRIANGLE to TOP LEFT BLACK LEFT-POINTING SMALL TRIANGLE
Anderson, Deborah; Whistler, Ken; Pournader, Roozbeh; Constable, Peter (2022-01-22), "20 Smalltalk", Recommendations to UTC #170 January 2022 on Script Proposals