In its broadest sense, terrorism is any act designed to cause terror. In a narrower sense, terrorism can be understood to feature a political objective. The word terrorism is politically loaded and emotionally charged.
A broad array of political organizations have practised terrorism to further their objectives. It has been practised by both right-wing and left-wing political parties, nationalist groups, religious groups, revolutionaries, and ruling governments. The symbolism of terrorism can exploit human fear to help achieve these goals.
"Terrorism" comes from the French word terrorisme, and originally referred specifically to state terrorism as practiced by the French government during the 1793–1794 Reign of Terror. The French word terrorisme in turn derives from the Latin verb terrere (e, terreo) meaning "to frighten". The terror cimbricus was a panic and state of emergency in Rome in response to the approach of warriors of the Cimbri tribe in 105 BCE that the Jacobins cited as a precedent when imposing the Reign of Terror during the French Revolution. After the Jacobins lost power, the word "terrorist" became a term of abuse.
Data (/ˈdeɪtə/ DAY-tə, /ˈdætə/ DA-tə, or /ˈdɑːtə/ DAH-tə) is a set of values of qualitative or quantitative variables; restated, pieces of data are individual pieces of information. Data is measured, collected and reported, and analyzed, whereupon it can be visualized using graphs or images. Data as a general concept refers to the fact that some existing information or knowledge is represented or coded in some form suitable for better usage or processing.
Raw data, i.e. unprocessed data, is a collection of numbers, characters; data processing commonly occurs by stages, and the "processed data" from one stage may be considered the "raw data" of the next. Field data is raw data that is collected in an uncontrolled in situ environment. Experimental data is data that is generated within the context of a scientific investigation by observation and recording.
The Latin word "data" is the plural of "datum", and still may be used as a plural noun in this sense. Nowadays, though, "data" is most commonly used in the singular, as a mass noun (like "information", "sand" or "rain").