将这四个概念联系在一起,是因为它们是我们创建运营商业网站必须考虑四个相辅相成的四个方面: 可以这样说，平衡Usability（可用性）和Accessibility（可访问性），优化达到Approachability（可到达性或搜索引擎友好性），最终实现Profitability（盈利能力）。

Usability  Resources （可用性参考资料）

The views and opinions presented in these papers, articles and opinion pieces are those of the author as an individual and may not be representative of the Association of Accessibility Professionals as a whole.

Best practice:

Web Usability: The Basics

Beware of Opening Links in a New Window

Ten Ways to Speed up the Download Time of Your Web Pages

Writing Effective Link Text

Opinion pieces

The Right Time to Spend Your Usability Budget

The Secret Benefit of Search Engine Optimisation: Increased Usability

Ten Usability Blunders of the Big Players

Accessibility Resources（可访问性参考资料）

The views and opinions presented in these papers, articles and opinion pieces are those of the author as an individual and may not be representative of the Association of Accessibility Professionals as a whole.

Introduction to Web Accessibility

Web Accessibility: The Basics

Disability Discrimination Act (DDA) & Web Accessibility

Ten Quick Tests to Check Your Website for Accessibility

How Disabled Users Access the Internet

How People With Impairments Use the Internet

Web Accessibility Myths

Listening To A Screen Reader

An Accessible Mindset

Accessibility: On a Shoe-String

Web Content Accessibility Guidelines in brief

Further reading

Accessibility Benefits

Benefits of an Accessible Website - Part 1: Increase in Reach

Benefits of an Accessible Website - Part 2: The Business Case

Functional, Accessible and Good-Looking

The Secret Benefit of Accessibility Part 1: Increased Usability

The Secret Benefit of Accessibility Part 2: A Higher Search Engine Ranking

Accessibility: Not Such a Bitter Pill

Opinion Pieces

Access Keys, of Limited Practical Value

Text only sites

Ten Accessibility Blunders of the Big Players

Manchester United: Top of the Web Accessibility League?

Is Accessibility the Last Great Alchemy?

Accessibility: Panning for Gold

Practical solutions for web developers

Accessibility footnotes

Web Pages and Graphics

Accessibility Lifecycle and Automated Tools