ISO INTERNATIONAL STANDARD 9241-20 Second edition 2021-11 interaction - Part 20: An ergonomic approach to accessibility within the Is0 9241 series Ergonomie de I'interaction homme-systeme- Partie 20: Approche ergonomique de I'accessibilite dans la série ISO 9241 Reference number IS0 9241-20:2021(E) ISO @IS02021 IS0 9241-20:2021(E) COPYRIGHT PROTECTED DOCUMENT @IS02021 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, withoutpriorwrittenpermission.Permission can berequestedfrom eitherIso at theaddress below orIso'smemberbodyinthecountryoftherequester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2021 - All rights reserved