[otrs] Different Pending status of ticket

Hi, We have these "pending auto close+", "pending auto close-" "pending reminder" types on a ticket. Could anyone tell me the meaning of each of these types? When a ticket has status as 'pending auto close+/- means what? Thanks N Ramesh This e-mail and any files transmitted with it are for the sole use of the intended recipient(s) and may contain confidential and privileged information. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. Any unauthorised review, use, disclosure, dissemination, forwarding, printing or copying of this email or any action taken in reliance on this e-mail is strictly prohibited and may be unlawful.