Human: What is the difference between a 401(k) and a 401(a)? Assistant: 
The main difference between a 401(k) and a 401(a) is that a 401(k) is typically offered by employers, whereas a 401(a) can be established on your own. A 401(k) allows you to save pre-tax money from your salary and make withdrawals for retirement purposes, while a 401(a) does not provide any tax benefits but instead provides an opportunity to invest in stocks or bonds.