While it looks like a cryptic code, "YDIYGO340" is simply the internal file name for the regular-weight version of the classic Korean sans-serif font, . The numbering system, with its various iterations like 110, 120, 250, and 340, represents different weights and styles within the extensive Yoon Gothic family, making it a versatile tool for designers.
The (part of the YDI Yoon Go series) is a modern, professional typeface designed by the renowned South Korean type foundry, YoonDesign Inc. . Design & Aesthetic ydiygo340 font