Glossaries: D

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A user interface that presents key information in a summarized form, often as graphs or other widgets. Derived from the classic automobile dashboard, the design of the interface depends on what information needs to be monitored or measured.

Data Center

A collective term for the physical site, network elements, systems, etc., that supports computing and network services.

Data Janitor

A subtask of data science concerned with the cleaning up of dirty or duplicative data. Oftentimes the janitor must get data into the correct columns and sort it.

Data Lake

Coined by Pentaho CTO James Dixon, a data lake is a massive data repository, designed to hold raw data until it’s needed and to retain data attributes so as not to preclude any future uses or analysis. The data lake is stored on relatively inexpensive hardware, and Hadoop can be used to manage the data, replacing OLAP as a means to answer specific questions. Sometimes referred to as an “enterprise data hub,” the data lake and its retention of native formats sits in contrast to the traditional data warehouse concept.

Data Scientist

A job that combines statistics and programming, using languages such as R, to make sense of massive data sets. IoT sensors, for example, create mountains of data, and the data scientist’s role is to extract valuable information and detect anomalies.

Data-Driven Decision Management (DDDM)

An approach to business governance valuing decisions that can be backed up with verifiable data.


A termed coined by Marc Blackmer, datakinesis occurs when an action taken in cyberspace has a result in the physical world. Industrial Control Systems, for example, are vulnerable to datakinetic attacks where physical equipment such as valves and sensors are compromised and damaged by hackers. Stuxnet is one such example.


Digital Data Storage. This format is used to store computer data on audio tape. It was developed by HP and Sony in 1989 and is based on the digital audio tape (DAT) format and was a widely used technology in the 1990s.


The stripping away of personally identifiable information from data prior to its use. The process must include the removal of both direct identifiers (name, email address, etc.) and the proper handling of quasi-identifiers (sex, marital status, profession, postal code, etc.).

Degrees of Freedom (DoF)

An engineering concept used in MEMS that describes the directions in which an object can move and generally the number of independent variables in a dynamic system.