Also known as E/I.
1997-2005 (Early Logo)
The E/I logo was modified in 2005.
As of 2021, this logo can still be seen on reruns of older shows, mainly Peep and the Big Wide World.
On 2016, a new logo was modified. As of 2020, it's no longer used on PBS programming itself, aside from occasional reruns of Mister Rogers' Neighborhood and a few other shows that still feature it, although it is used on other networks.