Buying vs. selling options

Buying a call	You have the right to buy a security at a predetermined price.
Selling a call	You have an obligation to deliver the security at a predetermined price to the option buyer if they exercise the option.
Buying a put	You have the right to sell a security at a predetermined price.
Selling a put	You have an obligation to buy the security at a predetermined price from the option buyer if they exercise the option.