(CRT). The 16:10 aspect ratio had its largest use in the 1995-2010 period, and the 16:9 aspect ratio tends to reflect post-2010 mass-market computer monitor, laptop, and entertainment products displays. On CRTs, there was often a difference between the aspect ratio of the computer resolution and the aspect ratio of the display causing non-square pixels (e.g. or on a 4:3 display).

The 4:3 aspect ratio was common in older television cathode ray tube (CRT) displays, which were not easily adaptable