Economic uncertainty and scandal have hammered the credibility of 401(k) retirement plans in recent years.

Still, millions of Americans are counting on their 401(k) plans to see them through the golden years.

If you’re considering enrollment in a 401(k) plan and would like to know more about how a plan works, you might visit one of the following Web sites devoted to the subject.

• MPower Cafe

It contains 401(k) features, expert question-and-answer sections, and the basics.

• SmartMoney.com

It features a 401(k) smart planner with insights on select topics.

• 401(k) Center

The Web site covers 401(k) basics, investment types and frequently asked questions.

• 401(k) Help Center

The Web site’s tools and topics section contains information ranging from 401(k) basics to IRS rulings and procedures.