This likely denotes a specific version or variation of the joining style (e.g., specific lead-in or lead-out strokes).
The "upd" implies this version includes improved spacing, cleaner connections, or better compatibility with word processors compared to previous versions. Educational Purpose: font xccw joined 1a upd
The evolution of typography continues with technological advancements, including variable fonts, which allow a single font file to behave like multiple fonts, offering a range of widths, weights, and even styles, including joining types. This likely denotes a specific version or variation