IBM stopped development of 4690 OS in 2005, porting all their software to Suse. Toshiba bought the point of sale business from IBM in 2012, but any 4690 based installs are a legacy from the early 2000s, as SuperPOS ACE is what IBM (now Toshiba) has been pushing for the past decade.
https://en.wikipedia.org/wiki/4690_Operating_System#4690