Hardware changes:
Additions, deletions, reconfigurations, relocations, or preventative or emergency maintenance.

Computing Systems software:
PTF's, product releases, versions, table changes, tuning, alterations to libraries, catalogs,
monitors, traps, or changes to priority mechanisms.

Environmental:
Power, UPS system, generators, air conditioning, chilled water, electrical work, facility
maintenance, security systems, fire control systems.

Network Systems:
Additions, modifications, lines, modems routers, network access, controllers, servers,
protocol converters. Software components either distributed or centralized, bitnet tables,
router software, servers.

Operating Procedures:
Changes in equipment downtime schedules, planned system outages, changes in delivering
services, or changes to service levels.

Workstations and Public Clusters:
Changes in hours of availability, hardware configurations, operating systems, utilities,
applications including release levels or versions, installations or de-installations of systems, servers.