There were numerous other standardized code pages beyond those. ij is a digraph traditionally used in Dutch and was present in at least one of the ECMA code pag

There were numerous other standardized code pages beyond those. ij is a digraph traditionally used in Dutch and was present in at least one of the ECMA code pages and isn’t really a publication ligature (it’s more on par with, e.g., the dz digraph for Croatian). Once upon a time I had a four inch binder with printouts of every single ECMA-accepted codepage which in addition to all the national/regional 8-bit encodings also included a number of Asian 16-bit encodings including three separate Chinese encodings (PRC, Taiwan, Hong Kong).