In the context of research and administration, typically refers to a specific course designation for doctoral dissertation research, most notably within the NYU Tandon School of Engineering . NYU Tandon Dissertation Research (CE-GY 998X)

: It represents dissertation-level research conducted by doctoral candidates.

: Once a student passes their qualifying examination, they must transition to CE-GY 999X , where a minimum of 15 credits is required for graduation. Other Potential Identifiers

While the NYU course is the most prominent "998X" reference in informative reporting, the term may also appear in technical or identification contexts: