In computing, access relates to the use of information and data. With access authorisations, it is determined which persons are authorised to use the stored data, information or applications.

Alarm Receiving Centre

An “Alarm Intervention Center” is a permanently staffed office in which signals are recorded and processed who indicate a dire need. The transmittal of the signals correspond to the DIN-standards. Alarm Intervention Centers need to comply to special...


Alerts are accustic or optical signals which point to a dire need and call for a deployment of defensive measures (interventions).


The Ampere is a physical parameter which was named after its explorer, the French physicist André Marie Ampère. It names the SI-base factor used for measuring the electric current.


The chemical element argon is an inert gas and is called the “sluggish element” due to its inertness. It symbols Ar (up to 1957 A only), its atomic number is 18. Argon has a suffocating effect and is therefore mainly used in gas extinguish systems within...

Availability Zone

An availability zone (AZ) corresponds to a Data Centre for a specific region. It is used to improve the availability and the fault-tolerance. The maintainer of a cloud may allot platforms such as Amazon Webservices or vSphere.

Backup Battery Unit (BBU) / Backup Battery Module (BBM)

The Backup Battery Unit (BBU) and the Backup Battery Module (BBM) define the battery of a RAID-controler that protects the writing cache from power cuts. The BBU is more and more replaced by a flash module with compensator. In case of a power failure, the content of...

Backup Data Centre

The backup Data Centre, also named “Mirroring Data Centre”, duplicates the original computer centre to another location. The duplication is valid both for hardware and software as well as the current data. It helps to prevent natural disasters, fires or...

Base Load

The base load refers to that part of a load to a consumption rate that remains unchanged during a fixed period (mainly day, month or year). It describes the total load on a network.

Best of Breed

When using the “Best of Breed”-principle, companies or organisations purchase applications and services from different providers. Thus, they ensure that they work with the best solution available in each segment.