The biggest challenge in computer accessibility is to make resources accessible to people with cognitive disabilities - particularly those with poor communication skills - and those without reading skills.

Their further development relies on public domain icons being available. Many people with a learning disability learn and rely on proprietary symbols. They thus become tied to particular products. The copyright owners are generally unwilling to release them on the web.

Other examples include Web accessibility a set of guidelines ^[1] and two accessible^[2] web portals designed for people developing reading skills are peepo.com [1] — try typing a letter with your keyboard for more — and peepo.co.uk [2] with enhanced graphics, unique style controls and improved interactivity (requires an SVG supported browser).