Data mirroring
- the process whereby targeted data is automatically replicated to other hard disks or servers; this helps to ensure availability of critical data in the event of any kind of disruption.

Differential backup
- the process of backing up data that has been modified or changed since the last full backup.

Disaster
-an event that creates the inability of an organization to maintain operations and provide key business operations and services for some period of time. The Federal Emergency Management Agency (FEMA) defines disaster as "an event that can cause deaths or significant injuries to employees, customers or the public; or that can shut down your business, disrupt operations, cause physical or environmental damage or threaten the facility's financial standing or public image".  .

Disaster recovery
- the ability of an organization to respond to a disaster or disruption bv executing a disaster recovery plan to restore critical operations and services.
 
Emergency Operations Center (EOC)
- A fixed location that is activated in an emergency and from which overall operations can be conducted.
 
Full backup
- the process of backing up all network data

Important services, operations and records
- sometimes referred to as critical; those that are almost irreplaceable or replaceable at some cost and/or strongly needed but behind those deemed vital and most immediately needed.
 
Incident command system (ICS)
- an established system of managing disaster response activities. It addresses common terminology, organization, integrated communications, a unified command structure, coordinated and consistent plans, and comprehensive resource management.
 
Incremental backup
- the process of backing up data that has changed since the previous incremental or full backup.
 
IT disaster recovery
- the ability of an organization to execute a disaster recovery plan to restore technology, communications and IT systems and key operations and services following a disaster or disruption.
 
National Incident Management System (NIMS)
- Developed by the United States Secretary of Homeland Security at the request of the President of the United States, the National Incident Management System (NIMS) integrates effective practices in emergency preparedness and response into a comprehensive national framework for incident management.
 
Non-essential services, operations and records
- any not required to maintain key district operations and services; could be indefinitely unavailable with no serious jeopardy to the critical operations of the organization.
 
Remote data replication
- the process of duplicating to offsite and geographically removed locations; this can be done automatically.
 
Risk assessment
- sometimes referred to as risk analysis; the process of identifying and minimizing the exposure the specific threats and related consequences for the organization, its people, its facilities and its systems.
 
Single point of failure
- one single part of a system that can cause the entire system to fail; that part might be data, applications, technology, people or other critical resources that are not backed up.
 
Vital services, operations and records
- those that are irreplaceable and/or require the most immediate access and availability; those that are critical for legal, regulatory or operational reasons.