noun
letter type code
Computing term for a code that represents a type of letter or character, likely in encoding or classification contexts.
このシステムでは、各文字に略字方式コードが割り当てられている。
In this system, a letter type code is assigned to each character.
Compound of 略字 (abbreviated character), 方式 (method/system), and コード (code). The exact derivation is uncertain; it appears to be a technical term formed from these components.