In ucnv_lmb.cpp, a file originating from IBM and included in the International Components for Unicode source tree, the lead byte 0x11 is commented as referring to "Korean: ibm-1261" after the definition of ULMBCS_GRP_KO, and is mapped to the "windows-949" ICU codec in the OptGroupByteToCPName array later in the file.
"3.1.1 Details of Problems". Problems and Solutions for Unicode and User/Vendor Defined Characters. The Open Group Japan. Archived from the original on 1999-02-03. Retrieved 2019-08-14.
"3.1.1 Details of Problems". Problems and Solutions for Unicode and User/Vendor Defined Characters. The Open Group Japan. Archived from the original on 1999-02-03. Retrieved 2019-08-14.