Terminal Tether

You are a "mandatory volunteer" working a terminal on the T.E.T.H.E.R. Institute's Vital Support Lifeline.

Keep the countdown from reaching zero by any means -- requesting extensions, purging the system when it gets out of control, (but definitely not taking advantage of any ill-advised temporal anomalies) -- lest you face a critical system error.
The T.E.T.H.E.R. Institute thanks you for your cooperation.