Related:

• The system will be down for 10 days for preventative maintenance.
• Hackers do it during PM. [Preventive Maintenance]
• Preventive maintenance is man's only weapon against entropy.
• PM /P-M/ 1. v. (from `preventive maintenance') To bring down a machine for inspection or test purposes.
  See provocative maintenance; see also scratch monk 2....
• PM: /P-M/ 1. v. (from `preventive maintenance') To bring down a machine for inspection or test purposes.
  See {provocative maintenance}; see also {scratch monkey}....
• System maintenance about to begin.
• We the Users, in order to form a more perfect system
  establish priorities, ensure connective tranquility, provide for common repairs, promote preventive maintenance, and secure the blessings of liberty for ourselves and our processes, do ordain and establish this Software of The Unixed States of America....
• provocative maintenance: [common ironic mutation of `preventive maintenance'] n.
  Actions performed upon a machine at regularly scheduled intervals to ensure that the system remains in a usable state....