Bob Minchin wrote:

Acer AL2016W lcd monitor which has an aspect
ratio of 1.6:1 (20" standard widescreen).

Except 16:9 is standard widescreen, 16:10 is a bit oddball, though not
unheard of.

I'd hesitate to call it a "driver" more of a description of the
preferred mode for the monitor ...

https://www.acer.com/ac/en/US/content/support-product/647?b=1