Final salary pensions
These pensions (sometimes also called 'defined benefit schemes'), are largely funded by employers, though staff sometimes have to pay into them as well. You will receive a percentage of your salary at the level it was before you retired, or left the employer, as an annual income. Exactly how much you will receive will depend on how much your salary was, and how long you worked for the employer.
Standard pensions
This is where you and/or your employer make regular monthly payments to a pension company, who will invest the money until you hit retirement. The amount you receive will depend on how much you and/or your employer paid in, and how well the investments performed.
Stakeholder pensions
These are similar to standard pensions, but have lower and more flexible minimum contributions, capped charges and a default investment choice so you don't have to make decisions about where your money is invested. The amount you receive will depend on how much you and/or your employer paid in, and how well the investments performed.
Self-invested personal pensions (SIPPs)
This is the DIY version of a pension, which allows you more control over how your money is invested (usually with the help of a financial advisor or investments company). The amount you receive will depend on how much you paid in, and how well the investments performed.