Although many people with disabilities do not use wheelchairs, the symbol is supposed to represent the general concept of disability, and the use of the symbol at an entrance to a building or room  indicates that the facility is accessible to everyone, regardless of their ability.

Unfortunately, this often misleads people into thinking that, if they provide wheelchair access, they have done all that is necessary. They completely forget that they also need to provide access for disabilities such as blindness, deafness or cognitive disabilities.

The symbol does not generally mean 'reserved'. The only time it does is on parking spaces for people with disabilities.