The phone switch for Nortel's Meridian PBX system circa 1994, which supported SONET and IP, had about 16 million lines of code. The complexity of a touchscreen

The phone switch for Nortel's Meridian PBX system circa 1994, which supported SONET and IP, had about 16 million lines of code. The complexity of a touchscreen is less than 1%, maybe less than 0.1% of that. Lines of code, however an absurd metric, in this case does say something. I'm just not sure exactly what, though.