You can keep 401k at you previous emploer
You can roll it over to a Rollover IRA, which can be rollover to the 401k of your next employer
You can roll it over to a traditional IRA, which cannot be rolled over to other 401k plans
You can keep 401k at you previous emploer
You can roll it over to a Rollover IRA, which can be rollover to the 401k of your next employer
You can roll it over to a traditional IRA, which cannot be rolled over to other 401k plans