by Lois Slavin of MIT News, 20 November 2002. Three of them follow: Date expansion Two-digit years were expanded to include the century (becoming four-digit years) in programs, files, and databases. Retrieved 11 February 2017. Presently, many US Government agencies have taken down their Y2K websites. "Who invented Y2K and why did it become so universally popular?". They flinch if I touch them she says. Data entry operators commonly entered 9999 into required fields for an unknown future date, (e.g., a termination date for cable television or telephone service in order to process computer forms using cics software. They don't believe it can lead anywhere says Aoyama.