ZAC Browser (Zone for Autistic Children) is a web browser designed specifically for children and teenagers with autism spectrum disorders, pervasive developmental disorders (PDD), and PDD-NOS.

The ZAC browser reduces the number of user interface controls and removes access to much of the Web in order to simplify the experience for autistic children.

LeSieur owned People CD Inc., a software production company, and released a web browser for children called KidCD in 2006.

This feature was problematic for autistic children, who generally prefer very organized displays.

LeSieur then developed an alternative version of KidCD 2.0, called ZAC Browser, which added aquarium graphics to the main page along with stationary icons.