A " 401(k)" is the name the government gives a certain kind of retirement savings plan.
“401(k)” 是政府给某种退休储蓄计划的名称。
英语百科
Registered Retirement Savings Plan
（重定向自Retirement Savings Plan）
A Registered Retirement Savings Plan (RRSP) is a type of Canadian account for holding savings and investment assets. RRSPs have various tax advantages compared to investing outside of tax-preferred accounts. They were introduced in 1957 to promote savings for retirement by employees and self-employed people.