<human>: What is the difference between a 401k and a 401a?
<bot>: The main difference between a 401k and a 401a is that a 401k is an employee-sponsored retirement savings plan, while a 401a is an employer-sponsored retirement savings plan. A 401k is funded solely by the employee's contributions, while a 401a can be funded with both employee and employer contributions. Additionally, 401ks typically offer more investment options than 401as.