004 Accessibility
Things should be designed to be usable, without modification, by as many people as possible.
• Historically, accessibility in design focused on accommodating people with disabilities.
• Modern practice accepts that most accommodations can be designed to benefit everyone.
• Make things perceptible by everyone. For example, position controls and information so that seated and standing people can perceive them.
• Make things usable by everyone. For example, minimize repetitive actions and the need for sustained physical effort.
• Make things learnable by everyone. For example, use redundant coding methods (e.g., textual, iconic, and tactile) on controls and signage.
• Make the consequences of errors non-catastrophic, and reversible ...
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