It's digital but you have to enter cooking times in this format
[time button] [enter the time] [time button] then [start]
It may be built around a soviet RPL calculator chipset.

It sounds as if whoever wrote the code didn't want to have to keep a running
calculation of the number of seconds -- just do it once with the second [time
button] press. Of course, it could have been done at [start] just as well.

The GE Jet in my range hood has a simple and easily understood entry system.
I'm amazed how many microwave ovens have confusing and complex systems.